Decay (2012) Timeline Explained – Every Event in Order

The LHC malfunction released Higgs boson radiation that destroys the human brain. Amy's simulations revealed that this radiation devastates brain tissue, causing the technicians who were exposed to radiation burns to become zombie-like creatures. The radiation essentially killed them but left their bodies moving, creating the undead threat.

Foreshadowing: Earlier, Amy runs simulations on how Higgs radiation affects human tissue, foreshadowing the zombie transformation.

• higgs boson radiation
• lhc malfunction
• zombie transformation
• brain damage
• cern

The Director-General insisted the LHC must continue running because the Higgs boson discovery was essential to CERN's mission and reputation. He overruled Dr Niven's safety concerns, prioritizing the scientific breakthrough over the potential catastrophe. This ambition to harness the collider's power directly led to the escalation of the crisis.

Foreshadowing: The opening tension between Dr Niven and the Director-General about stopping the machine establishes his reckless prioritization of discovery over safety.

• director-general
• cern leadership
• higgs boson
• safety concerns
• ambition

Amy ran simulations on the mainframe to determine how Higgs boson radiation would affect human tissue. The results showed that the radiation could devastate the brain, which explained why the radiation-exposed technicians became violent and zombie-like rather than simply dying from their injuries.

Foreshadowing: While Amy runs the simulations, the LHC monitor shows the accelerator activating on its own, hinting that something is already wrong.

• amy simulation
• higgs radiation
• brain damage
• cern mainframe
• technician infection

The film establishes that someone tampered with the interlock array from within CERN, but the saboteur's identity is never explicitly revealed. This sabotage caused the initial beam dump anomaly that triggered the cascade of events leading to the zombie outbreak.

Foreshadowing: The discovery of the sabotaged interlock array early in the crisis hints that the disaster may have been caused by deliberate human interference rather than pure accident.

• sabotage
• interlock array
• cern conspiracy
• internal sabotage

James was bitten by one of the infected technicians while escaping through the maintenance tunnels. He later succumbs to his injuries and transforms into a zombie, forcing Connor to shoot him dead. This moment represents the emotional climax where the survivors must kill their own friend.

Foreshadowing: Earlier in the tunnel, James is bitten during the pursuit, and the team realizes the infection spreads through bites.

• james bitten
• zombie transformation
• connor kills james
• friend turned zombie

Lisa was originally scheduled to attend a conference in Barcelona and withdrew from the investigation team to go to Barcelona. Her absence places Matt on the team instead, and she becomes unreachable during the crisis when Amy tries to call her with evidence against the Director-General.

Foreshadowing: Lisa's withdrawal during the meeting sets up her unavailability at the crucial moment when Amy needs to report the truth.

• lisa barcelona
• conference
• communication failure
• absence

The survivors were trapped deep underground in the LHC maintenance tunnels where there was no mobile signal. They needed to reach the mainframe server room to contact outside authorities, but the system's firewall initially blocked their attempts to breach communication.

Foreshadowing: When the emergency shutdown fails, the team realizes the elevator isn't working and they have no way to call for help from above ground.

• no mobile signal
• underground cern
• communication blocked
• mainframe breach

The Director-General is responsible for prioritizing the LHC's continued operation despite known safety risks, which directly caused the catastrophic malfunction. He also appears to have been aware of the potential dangers and chose to ignore them. His decisions and possible cover-up led to the deaths of multiple staff members.

Foreshadowing: The tension between Dr Niven's warnings and the Director-General's insistence on running the LHC establishes his culpability from the start.

• director-general responsibility
• negligence
• scientific cover-up
• cern leadership fault

The ending is deliberately ambiguous. The Director-General enters Dr Niven's office with a gun while Amy's call to Lisa is still connected to voicemail. A gunshot rings out as the screen fades to black. It's unclear whether the Director-General killed himself, killed Amy, or the shot was meant for something else. The truth about the catastrophe remains unrevealed.

Foreshadowing: The Director-General's confrontation with the evidence against him and his possession of the gun builds to this ambiguous climax.

• final gunshot
• ambiguous ending
• director-general death
• amy fate
• unresolved ending

The radiation from the LHC's malfunction didn't just kill the technicians - it destroyed their brains in a way that left their bodies functional but stripped of humanity. They showed severe radiation burns that should have been fatal, yet the boson radiation affected their nervous system differently, allowing them to continue moving and attacking.

Foreshadowing: When the team discovers the dead security guard and sees the technicians with radiation burns still pursuing them, they realize something far worse than a standard emergency is unfolding.

• zombie radiation burns
• necrotic state
• undead cern
• higgs boson effect

Connor and Amy survived because they reached the mainframe server room to unlock the doors and then fled through maintenance tunnels while the zombies were still contained. Amy made it to the surface and to Dr Niven's office to gather evidence, while Connor escaped with her. However, the zombies eventually breached external doors, and their survival is short-lived given the unresolved ending.

Foreshadowing: The team strategically uses the mainframe to unlock doors and the coolant to repel attackers, giving them opportunities to escape.

• connor survival
• amy escape
• survivors
• final survivors