28 Years Later: The Bone Temple

Spike is captured by The Fingers, a Satanist cult led by Sir Jimmy Crystal. To prove his loyalty and become a member, he must undergo a brutal initiation where he fights and kills one of the existing Jimmys. He faces Jimmy Shite, who taunts him relentlessly. Spike retaliates by exposing Shite's pants and thrusting a knife into his thigh, severing an artery and causing Shite to bleed out. Sir Jimmy then dubs Spike a new "Jimmy," officially welcoming him into the cult.

Dr. Ian Kelson keeps Samson, a highly dangerous infected Alpha creature, sedated using morphine to maintain control over him while studying the infected. However, their relationship becomes increasingly blurred: Samson actively seeks out the drug, visiting Kelson as if drawn to the calm, lucidity it provides. Kelson grows dependent on administering it, spending evenings watching the sky with the drugged creature while Duran Duran plays in the background. When morphine runs low, Kelson contemplates euthanizing Samson rather than risk his unchecked fury.

When Kelson prepares to euthanize Samson due to dwindling morphine supplies, the Alpha creature looks up at the night sky and utters the word "moon." This moment deeply affects Kelson, who sees it as a sign of something beyond mere animal instinct, a spark of awareness or perhaps communication. It renews Kelson's sense of purpose and convinces him to continue his work rather than kill the creature.

Ink (whose real name is Kelly) has been observing Sir Jimmy's increasingly brutal leadership and the cult's senseless violence. During the ritual at the Bone Temple, when Sir Jimmy tries to assert authority over Kelson and demands the sacrifices continue, Ink sees an opportunity. She stabs Sir Jimmy to death and then kills the remaining Fingers, freeing Spike from the cult. Her betrayal is motivated by disillusionment with Sir Jimmy's chaos and perhaps a growing attachment to Spike, whom she comforted earlier during the gruesome sacrifice scene.

Ink previously showed sympathy for Spike when he vomited during the barn sacrifice, hinting at her growing doubts about the cult.

The Bone Temple is Dr. Kelson's macabre laboratory and living space, constructed from the bones of infected corpses, including a pregnant infected woman who gave birth to Baby Isla. Located on the outskirts near the farm, it serves as both Kelson's research facility and the site where The Fingers eventually bring their sacrifices. Kelson stages an elaborate theatrical display there with flames and hallucinogens set to Iron Maiden's "The Number of the Beast" to impress the cult and maintain his uneasy alliance with Sir Jimmy.

After Ink betrays and kills Sir Jimmy, he is left weakened from drugs and hallucinogens. The infected swarm the area as the chaos unfolds. Sir Jimmy ends up crucified upside down, and as the infected close in, they finish him off in the glow of the burning embers from the Bone Temple ritual. His death represents the consequences of his cult's violent reign, they created enough chaos to attract the infected, which ultimately consume him.

Tom, Cathy, and their companion Jonno return home to find the Fingers have taken over their farm. George, Jane, Tom, and Matthew are tied up in the barn. Matthew throws boiling water as a distraction, allowing Cathy to escape but the others remain captured. During the rescue attempt, Sir Jimmy offers Tom freedom if he kills a Finger, Tom targets Jimmima but Cathy returns and kills Jimmima with a hook instead. Tom then lights a propane tank, igniting the barn. The barn burns with many captives inside, including George, Jane, and Matthew, as Tom is struck by an arrow.

After Ink kills Sir Jimmy and the remaining Fingers to free Spike, she reveals her true name to him as they escape into the woods together. This act represents genuine trust and a new beginning outside the cult, she is abandoning her cult identity ("Ink") and the violent world of The Fingers. By sharing her real name, she signals a personal connection to Spike and a desire to start fresh as something other than a cult member.

Jim and his teenage daughter Sam appear in the final scenes, living in a cottage somewhere in London away from the main chaos. They hear the distant commotion of the infected and spot Spike and Kelly fleeing through the woods. Rather than hiding, they arm themselves and head out to defend the pair from afar, suggesting they are experienced survivors who choose to help others despite the risks. Their introduction hints at a fragile hope and potential new allies for Spike and Kelly.

Spike is forced to watch as The Fingers tie up George, Jane, Tom, and Matthew in the barn and begin skinning them alive as sacrifices to Satan. The graphic brutality of the ritual proves too much for Spike, who vomits at the carnage. This moment shows he still retains his humanity and moral compass, distinguishing him from the cult members who revel in the violence, ultimately setting the stage for his later escape with Ink.