Helix

A CDC medical team investigates a disease outbreak at a high-tech research facility in the Arctic, where they uncover a hidden project with potentially catastrophic implications for humanity.

Dr. Alan Farragut intensifies his search for his infected brother Peter while a quarantine at the lab strains three scientists and risks causing unrest. Meanwhile, Doreen uncovers potential deception in Dr. Hatake's research.

Alan establishes an isolation unit to contain the infected lab workers, while Walker and Jordan confront the unsettling possibility that they may also be infected with the deadly virus.

Alan takes extreme measures in an attempt to cure Peter, putting his life in jeopardy, while Walker forms an alliance with a young, enigmatic researcher to endure the quarantine. Meanwhile, Jordan uncovers a critical flaw in her Rapid Response test.

With Peter's condition worsening due to Alan's experimental treatment, Jordan faces a heart-wrenching choice as the virus continues to spread. Meanwhile, Walker uncovers unexpected information about a key supporter, and Daniel confronts Balleseros in a tense showdown.

Daniel's abandonment of Balleseros leads to the uncovering of his ties to Hatake, while Alan faces emotional challenges as he tries to rescue Peter and navigate his relationships with Walker and Jordan.

As Constance Sutton, CEO of Ilaria, arrives to retrieve the virus and its cure, Alan discovers Walker appears to be free of symptoms. Meanwhile, Daniel uncovers the truth about how he was "adopted" by Hatake.

Alan rescues his brother Peter from Constance Sutton, the CEO of Ilaria, but Peter is soon recaptured by the Vectors. Meanwhile, Julia Walker investigates the nature of her mysterious "cure," and her half-brother Daniel confronts their father, Dr. Hatake, about his childhood abduction.

The CDC team uncovers the true nature of the infection, prompting Alan and Julie to embark on a dangerous mission to recover the canister containing the original virus.

Alan and Julia visit an abandoned satellite station in search of assistance and a cure, where they uncover a startling revelation about Hatake's true intentions and the origins of the deadly virus.

The Vectors unite in an effort to track down survivors who have not been infected, while the CDC works on a dangerous potential cure. Meanwhile, a group of assassins from Ilaria covertly enters the base.

While the CDC works to secure the virus and its cure, the uninfected take shelter in a hidden bunker on the base, and Hatake is captured by Ilaria assassins who threaten to kill one of his children unless he makes a choice.

Alan and Peter interrogate captured assassin Scythe for information about Julia's missing mother, while Balleseros questions Hatake about the disappearance of Inuit children. Anana and her brother discover what happened to Daniel, and fears that the virus has returned to Ilaria prompt Alan and the team to leave the base and search globally for it.

Fifteen months after the Arctic Biosystems incident, a new CDC team, including biotoxicologist Kyle Sommer, investigates a possible outbreak aboard a cruise ship in the Northern Pacific, which leads them to an island inhabited by a cult led by the enigmatic Michael. Concurrently, in the year 2048, Walker travels to the same island in search of Alan Farragut.

The CDC team continues their investigation on the island and learns that Peter's brother, Alan, is part of Brother Michael's religious group. Alan urges them to leave the abbey, but his warnings go unheeded.

Peter and Jordan venture beyond the Abbey to collect specimens, encountering mysterious creatures in the surrounding woods, while Sister Amy secretly schemes to drive them away permanently.

Michael faces increasing challenges in managing the abbey, while the CDC team gets closer to identifying the pathogen's origin. Alan wrestles with his desire to return to his team and uncovers the truth about Peter's loyalties. In the future timeline, Walker attempts to flee from her delusional father, risking serious consequences.

Michael imprisons Peter and Alan, but Alan escapes and learns a hidden secret about Kyle. Agnes discloses a surprising truth to Michael, causing him to turn against her. In the future, Caleb discovers Walker's betrayal and acts independently to address it.

Amy accidentally triggers a disease outbreak. Meanwhile, Michael subjects Peter to psychological torment in the pit, while Alan, Jordan, and Kyle uncover disturbing truths about the Abbey's ecosystem. As tensions rise and an uprising threatens the uninfected, the Balleseros encounter an unexpected immortal in modern-day Paris.

Peter is assigned a new cellmate as tensions rise in the prison, while Michael confronts a growing rebellion among his followers and responds with drastic measures to maintain control.

The Coast Guard arrives to transport the CDC team to a different island where a new outbreak has occurred. At the same time, Sister Amy faces challenges from Brother Michael regarding his own intentions.

Alan, Kyle, and Winger venture into the woods in search of a tree with red sap that could potentially serve as a cure for the pathogen.

Tensions rise at The Abbey as Kyle's condition worsens due to a mysterious infection, while Anne takes steps to secure Michael's legacy by grooming a potential successor.

The Navy moves forward with Plan B, a drastic measure intended to contain the virus by preventing any infected individuals from leaving the island.

As the CDC works to secure canisters containing the virus and a potential cure, a group of uninfected individuals remain hidden in a secret bunker on the base. Meanwhile, Ilaria assassins take Hatake captive and threaten to kill one of his children unless he makes a choice.

Kyle saves Dr. Sarah Jordan while Alan Farragut confronts his brother, Peter, in a tense and personal battle.