Genesis
When a synthetic T-cell used to cure Barclay's illness mutates and becomes airborne, it causes the Enterprise crew to de-evolve into earlier forms of life, forcing Picard and Data to race against time to find a cure before they all transform completely.
The USS Enterprise encounters a bizarre crisis when a synthetic T-cell, initially administered to cure Lieutenant Barclay of a minor illness, unexpectedly mutates and spreads throughout the ship. This modified T-cell activates dormant introns within the crew's DNA, triggering a rapid de-evolution into earlier forms of life.
The crisis begins subtly with crew members experiencing strange symptoms: Riker's slowed thinking, Troi's increased sensitivity to temperature, and Worf's aggressive behavior. Beverly Crusher discovers the source of the problem when she finds a venomous sac developing on Worf's neck, leading to a shocking attack that leaves her incapacitated. As the situation worsens, the crew physically transforms, exhibiting traits of their evolutionary ancestors. Barclay rapidly gains energy and enhanced skills, while others show signs of regression.
Picard and Data, returning from a mission to recover a stray torpedo, find the Enterprise adrift and in chaos. The crew has scattered, with many devolving into animalistic states. They discover Troi in her quarters, transformed into an amphibian, and encounter Riker devolved into a proto-human. Data determines that the crew is de-evolving due to activated introns, remnants of genetic code from earlier stages of evolution.
As Picard begins to experience his own de-evolution, becoming more fearful and instinct-driven, he and Data race against time to find a solution. They discover that Nurse Ogawa, who is pregnant, carries an unaffected embryo. Data theorizes that the amniotic fluid could provide a template for a retro-virus to counteract the synthetic T-cell. The pair work to repair the ship's damaged systems and synthesize the retro-virus.
Their efforts are complicated when Worf, devolved into a primitive Klingon, fixates on Troi as his mate and relentlessly pursues her. Picard is forced to lure Worf away from Sickbay, using a pheromone-based distraction synthesized by Data from Troi's DNA. This leads to a harrowing chase through the ship's Jefferies Tubes, where Picard eventually subdues Worf using a plasma discharge.
Data successfully synthesizes and releases the retro-virus into the ship's atmosphere. Over time, the crew returns to normal. Beverly identifies the anomaly in Barclay's genetic chemistry as the catalyst for the crisis. The episode concludes with the crew recovering and Beverly considering naming the new ailment "Barclay's Proto-morphosis Syndrome."
Events in This Episode
The narrative beats that drive the story
The narrative opens in Sickbay, establishing Lieutenant Barclay's pervasive hypochondria, which Doctor Crusher addresses by administering a synthetic T-cell to combat a mild Urodelan Flu. During this initial sequence, Nurse Ogawa reveals her pregnancy, a detail that will prove critically important later, and Data entrusts Barclay with the care of his expectant cat, Spot. This seemingly innocuous setup subtly introduces the key biological elements and characters central to the unfolding crisis. Following this, Captain Picard and Data depart the Enterprise on a mission to retrieve a stray photon torpedo, leaving Commander Riker in temporary command. Almost immediately, during routine weapon tests, Lieutenant Worf exhibits unusual agitation and aggression, snapping at Riker and later displaying increasingly feral eating habits in Ten Forward, coupled with a disturbing, predatory gaze directed at Counselor Troi. Troi, in turn, begins to experience an uncharacteristic and intense sensitivity to cold. Worf's behavioral regression escalates further as he instinctively constructs a crude nest in his quarters, adopting a fetal sleeping position, signaling a profound, primordial shift within his biology. These early, unsettling changes among key crew members serve as the initial tremors of the widespread de-evolution about to engulf the ship, effectively establishing the central mystery and strategically removing the two most capable problem-solvers from the immediate scene. The synthetic T-cell, administered to Barclay, stands as the silent, unseen catalyst for the impending biological catastrophe.
In a moment of levity amid the crew’s de-evolution crisis setup, Commander Riker seeks medical treatment in Sickbay for injuries sustained during a romantic encounter with Rebecca White—specifically, cactus thistles …
In Sickbay, Beverly Crusher diagnoses Barclay’s hypochondriacal fears as a mild case of Urodelan Flu, a rare K-3 cell imbalance. Her administration of a synthetic T-cell—intended to activate a dormant …
In Sickbay, Data brings Spot for a routine checkup, where Beverly and Ogawa confirm her imminent litter. The scene unfolds amid the crew’s early de-evolution symptoms—Riker’s thistle-ridden back and Barclay’s …
In the bustling Sickbay, Ogawa tends to Riker’s minor injuries while Beverly diagnoses Barclay’s hypochondria—only to discover his dormant T-cell gene, which she activates with a synthetic T-cell injection. Meanwhile, …
During a routine weapons test on the Enterprise bridge, Worf demonstrates the upgraded photon torpedoes with characteristic enthusiasm, while Picard’s detached demeanor contrasts with the crew’s operational focus. When one …
The bridge crew conducts a routine test of the Enterprise's upgraded photon torpedoes, with Worf demonstrating their enhanced yield and targeting systems. When one torpedo malfunctions and veers off course, …
In Data’s quarters, Data entrusts Barclay with overseeing Spot’s impending birth, leveraging their mutual affection to ensure the cat’s comfort during a critical biological process. Barclay, initially surprised but touched …
In Data’s quarters, the android prepares to depart for a critical mission with Picard, leaving Spot—his pregnant cat—in Barclay’s care. The scene begins with Data’s clinical yet oddly tender request, …
In Data’s quarters, the android prepares to leave Spot—now pregnant and vulnerable—under Barclay’s care, revealing his growing attachment to the cat through a rare display of tenderness (a kiss goodbye). …
In Ten Forward, Worf’s unchecked aggression and primal eating habits—tearing into raw meat with Klingon ferocity—signal the accelerating de-evolution of the crew. His sudden, predatory gaze at Troi exposes the …
Worf’s de-evolutionary regression manifests in uncharacteristic ferocity as he consumes raw meat with primal abandon in Ten Forward, his Klingon restraint unraveling. When Troi arrives for their scheduled lunch, his …
The de-evolutionary symptoms among the crew intensify and spread rapidly. Lieutenant Barclay displays extreme hyper-energy, rapid speech, and nervous tics, indicating an accelerated metabolic state, while Commander Riker's cognitive abilities noticeably decline, rendering him slow and struggling to comprehend technical reports or diagrams. In Engineering, Barclay and Geordi discover a corroded panel, suggesting an unknown, highly corrosive organic solvent is at work, a precursor to the biological nature of the threat. Simultaneously, Counselor Troi's obsession with warmth and hydration escalates dramatically, leading her to immerse herself in her bathtub, fully clothed, in a desperate, instinctual attempt to regulate her rapidly changing body temperature. On the Bridge, Riker's mental incapacitation becomes profound, rendering him unable to make even basic decisions or recall recent events, leaving the ship's command structure critically compromised. The crisis culminates dramatically when Worf, now fully consumed by primal instincts, violently bites Troi on the cheek. Doctor Crusher, investigating Worf's increasingly erratic and animalistic behavior, discovers a strange, veiny venomous sac developing on his neck. Before she can fully understand its implications, Worf attacks her with a blast of bio-acidic venom and escapes Sickbay, leaving her incapacitated and the medical bay in disarray. Nurse Ogawa reports widespread strange behavioral changes among sixty crewmen, confirming a rapidly spreading, unknown disease. The act concludes with Riker completely disoriented, staring vacantly out a window, unable to contact Starfleet, signifying the Enterprise's descent into chaos and the crew's complete loss of control.
In Engineering, Barclay demonstrates heightened focus and technical initiative while diagnosing a plasma conduit failure, his nervous energy masking the early stages of his de-evolution. Riker, however, struggles to follow …
In Engineering, Barclay’s hyperactive, twitchy energy contrasts sharply with Riker’s uncharacteristic mental sluggishness, marking the first visible signs of the de-evolution virus’s cognitive effects. Barclay, usually anxious and hesitant, now …
Riker arrives on the bridge to find an unusually high temperature and Deanna Troi absent during her watch, which violates protocol. Worf, visibly unwell and agitated, requests to leave, hinting …
Riker arrives on the bridge to find Worf visibly unwell and Troi absent during her watch, signaling the escalating de-evolution crisis. When Ensign Dern asks about the pending Starfleet weapons …
In a moment of unchecked primal regression, Worf—stripped of his Klingon discipline by the T-cell mutation—invades Troi’s private bathroom, his predatory instincts fully unleashed. The steam-filled room heightens the surreal …
In Troi’s steam-filled bathroom, Worf—overwhelmed by de-evolutionary instincts—invades her private space with predatory fixation. His primal urges strip away Klingon discipline, reducing him to a growling, territorial creature. When Troi …
Captain Picard and Data return to the Enterprise after their three-day mission, finding the starship adrift, dark, and tumbling aimlessly through empty space. All internal systems are in emergency mode, and communication attempts fail entirely. Upon boarding the shuttlebay, they encounter a ship transformed into a primal, disorienting environment, filled with strange animalistic howls, screeches, and clicks, along with an abundance of pungent pheromones. Their initial exploration leads them to discover a long, dried reptilian skin husk, resembling a shed human-like epidermal layer, providing the first concrete evidence of profound biological changes. Their search for the crew leads them to Counselor Troi's quarters, now a steamy, humid, greenhouse-like environment. There, they find Troi submerged face-down in her bathtub, having de-evolved into an amphibian with prominent gill slits, oily skin, and inhuman golden eyes with vertical red slits. She gasps for air and shows no recognition of Picard or Data. Data's scans confirm her DNA is undergoing rapid re-sequencing, fundamentally altering her into an ancient, water-dwelling lifeform. They then find Ensign Dern dead on the Bridge, his body bearing severe scratch marks and a broken spinal column, consistent with an animal attack, and his DNA showing early stages of mutation. In the Ready Room, they encounter Commander Riker, who has devolved into a proto-human, exhibiting a pronounced forehead, large canines, and dark hair, attacking them with primal, unthinking aggression. Data definitively concludes that the entire crew is de-evolving, each transforming into earlier forms of life from their respective homeworlds. This act marks the grim realization of the catastrophe's true nature and terrifying scale, setting the stage for the desperate search for a cure.
Beverly Crusher investigates Troi’s unexplained hypothermia and Worf’s catatonic state, uncovering a grotesque venom sac on his neck—a mutation from the airborne T-cell virus. When Worf, now feral and unresponsive, …
Beverly Crusher examines Worf in Sickbay, discovering a grotesque venom sac on his neck—a mutation triggered by the airborne T-cell pathogen. When she attempts to inspect it, Worf, now feral …
In a darkened, sound-filled corridor of the Enterprise, Picard and Data move cautiously past eerie animalistic cries—howls, screeches, and clicks—echoing through the ship. Picard spots a discarded reptilian husk on …
Picard and Data navigate the Enterprise’s darkened corridors, now filled with unsettling animalistic sounds—howls, screeches, and distant cries—that signal the crew’s accelerating de-evolution. Their discovery of a discarded reptilian skin …
In Sickbay, Picard and Data examine the unconscious proto-human Riker. Data provides a detailed explanation of the de-evolutionary process: a synthetic T-cell has invaded the crew's genetic code, activating latent introns—dormant genetic codes from earlier evolutionary stages—which are now re-sequencing their DNA into ancestral configurations. Picard receives the alarming news that he, too, is infected and will begin his own de-evolution within twelve hours, likely into an early primate like a lemur. Seeking a solution, they move to Data's quarters, where they discover Spot has transformed into an iguana, but her newly born kittens are miraculously unaffected by the virus. This critical observation leads Picard to theorize that natural immune systems within the womb, specifically amniotic fluid, might contain antibodies capable of inhibiting the virus. Data identifies pregnant Nurse Ogawa as a potential human source for a retro-virus. Their efforts are interrupted by a ship-wide tremor, indicating a warp plasma vent failure, necessitating a trip to Engineering. In Engineering, Picard encounters Lieutenant Barclay, now a terrifying spider-like creature with bulbous black eyes and hooked hands, who attacks him. Picard experiences an intense, primal feeling of fear and panic, confirming his own impending transformation and the activation of his own ancestral instincts. They locate Ogawa, who is also beginning to de-evolve, and Data begins the urgent work of synthesizing a retro-virus from her unaffected embryo's amniotic fluid. The act culminates with Worf, now a heavily armored, monstrous Klingon, violently attacking the Sickbay door, trapping them and raising the stakes to an immediate, physical threat, as their time to find a cure rapidly diminishes.
Picard and Data enter Troi’s bathroom to find her submerged in the bathtub, her body motionless and seemingly lifeless. Picard pulls her from the water, only to discover her horrifyingly …
In Troi’s steam-filled bathroom, Picard and Data find her submerged in the bathtub, her body motionless and face-down in the water. Picard pulls her up, revealing her horrifying transformation: gill …
Picard and Data discover Counselor Troi submerged in her bathtub, her body fully transformed into an amphibian-like state. Her gills, golden slit-pupiled eyes, and eel-like skin confirm her irreversible de-evolution, …
Picard and Data return to the Enterprise’s bridge to find it in ruins—walls clawed, consoles shattered, and Ensign Dern’s corpse sprawled on the deck, his spine broken and DNA already …
Picard and Data arrive on the darkened, vandalized bridge to find Ensign Dern’s corpse—his spine broken and DNA mutating—confirming the airborne virus has begun irreversible de-evolution across the crew. While …
Picard and Data enter the Ready Room to find Commander Riker in a horrifyingly reduced state—his cognitive functions stripped to a proto-human level. His physical appearance is grotesque: a thickened …
Picard and Data enter the ready room to find Riker—now a proto-human—violently clawing at a fishbowl, his cognitive functions reduced to primal instincts. When Picard attempts to address him, Riker …
Picard and Data enter the ready room to find Riker in a violent, de-evolved state—his physical features now resembling a proto-human, with a thickened skull, protruding canines, and primate-like hair. …
In Sickbay, Picard and Data examine the unconscious, proto-human Riker—now regressed into an Australopithecine state—after Picard administers a tranquilizer to keep him sedated. Data’s DNA analysis confirms the synthetic T-cell …
In the dimly lit Sickbay, Picard and Data examine the unconscious, proto-humanoid Riker, whose DNA has been hijacked by a synthetic T-cell activating dormant introns. Data explains that the virus …
In Sickbay, Picard and Data analyze Riker’s de-evolved DNA, confirming the synthetic T-cell mutation activates dormant introns, forcing crewmembers into ancestral forms. Data reveals Picard is infected with a 12-hour …
In Data’s quarters, Picard and Data investigate the source of mewing kittens, only to discover Spot has transformed into an iguana while her newborn kittens remain unaffected. This anomaly prompts …
In Data’s quarters, Picard and Data discover Spot—the ship’s cat—has transformed into an iguana while her newborn kittens remain unaffected by the de-evolution virus. This anomaly triggers a scientific breakthrough: …
Picard and Data enter Data’s quarters to find Spot’s kittens abandoned while Spot herself has de-evolved into an iguana. Data’s tricorder scan reveals the kittens are unaffected by the intron …
Picard and Data enter Engineering to repair a damaged plasma vent, only to discover the space infested with fibrous webs and an eerie chittering noise. Picard investigates Geordi’s office and …
In the darkened, flickering Engineering section, Picard and Data cautiously investigate the warp core after a malfunction. Picard discovers Geordi’s office infested with spider-like webbing, triggering his primal fear as …
In a moment of fragile scientific breakthrough, Data reveals that Nurse Ogawa’s unaffected embryo—specifically its amniotic fluid—can serve as a template for a retro-virus to reverse the crew’s de-evolution. Picard, …
Picard and Data, racing against the crew’s de-evolution, achieve a critical breakthrough: Data identifies Ogawa’s unaffected embryo as the key to synthesizing a retro-virus cure. Just as Picard’s relief surfaces—‘How …
The climax unfolds with Worf, now a formidable, de-evolved Klingon, relentlessly attempting to breach the Sickbay door, trapping Picard and Data inside. Picard, battling his own escalating primal fears and instincts, deduces Worf's motivation: a powerful mating drive towards the amphibian Troi. Data swiftly synthesizes a highly amplified pheromone lure using Troi's genetic material. Picard, despite his terror and the onset of his own de-evolutionary symptoms, bravely takes the hypospray and ventures into the corridors to draw Worf away from Sickbay, allowing Data to continue working on the retro-virus. The chase is intense and harrowing, with Picard spraying pheromones to confuse Worf, who is revealed in his full, terrifying prehistoric Klingon form—a hulking creature with enormous, chitinous ridges, snapping mandibles, and immense strength. Trapped in a turbolift, Picard narrowly escapes into a Jefferies Tube. Worf pursues, spraying Picard with corrosive venom, causing painful acid burns on his arm. Cornered, Picard ingeniously uses the previously re-routed plasma cable from Act Two to electrocute Worf, subduing the creature without killing him. With Worf incapacitated, Data successfully synthesizes and releases the retro-virus into the ship's atmosphere. Over time, the crew gradually returns to their normal states. Doctor Crusher later explains the anomaly in Barclay's genetic chemistry caused the synthetic T-cell to mutate and activate dormant introns, leading to the widespread de-evolution. She proposes naming the new ailment “Barclay's Proto-morphosis Syndrome,” concluding the bizarre and dangerous ordeal with a touch of characteristic Starfleet humor.
With Worf’s feral assault on Sickbay’s door escalating, Picard—fighting his own de-evolving instincts—analyzes the Klingon’s primal howls and realizes they stem from a mating drive triggered by Troi’s earlier bite. …
In Sickbay, Picard and Data face an escalating crisis as Worf, now fully de-evolved into a feral Klingon, repeatedly smashes against the door, his primal mating instincts fixated on Troi. …
In Sickbay, Picard and Data face the escalating threat of Worf, now fully de-evolved into a feral Klingon predator, who is violently attempting to break through the door to reach …
Picard, armed with a hypospray of pheromones and a phaser, executes a high-risk tactical maneuver to distract Worf from Sickbay. Worf, now a hulking, feral Klingon in advanced de-evolution, is …
In a high-stakes moment of parallel action, Picard uses pheromones to distract a feral, de-evolved Worf—now a monstrous prehistoric Klingon—luring him away from Sickbay to prevent interference with Data’s critical …
Trapped in a malfunctioning turbolift, Picard escapes through the ceiling hatch into the Jefferies Tube, only to be ambushed by Worf—now fully devolved into a feral, venom-spitting Klingon. The chase …
In a parallel split-screen of escalating tension, Picard battles a feral Worf in the Jefferies Tubes while Data races to stabilize Ogawa’s DNA re-sequencing in Sickbay. Picard, cornered in a …