Vipers

A relentless, principled lawman who becomes the town’s de facto crisis manager. He sprints from danger to protect others, improvising with fires extinguishers and improvised barriers. His vigilant, protective nature keeps Maggie and Nicky moving toward safety while he weighs legal duty against personal risk.

A resourceful store owner who is marginalized for growing marihuana but proves pivotal in the crisis. She escapes imprisonment using tools left behind and helps coordinate escapees, often taking bold chances to shield others. Her practical skills and street-smarts become invaluable in subduing threats.

Security chief who aligns with Burton to capture vipers, then reveals a self-serving plan to escape alone. His ambition and ruthlessness come at a moral cost, and his presence accelerates the crisis’s stakes. He ultimately pays with his life after being bitten while attempting to flee.

A physician affiliated with Universal Bio Tech who probes Jake’s bite and becomes entangled in the facility’s controversial strategies. She navigates the ethical fog created by the company’s plans, pressing Burton to reconsider the attack while concealing her own competitive motives.

CEO of Universal Bio Tech orchestrating the plan to gas the island to quell the outbreak and salvage his operation. His power-mongering, strategic thinking, and willingness to sacrifice others drive the conflict toward a dangerous culmination. He faces consequence and arrest before a final, ironic end.

A physician who treats the injured, including Jake, and serves as a grounded voice amid chaos. He contributes practical medical expertise to stabilize victims and guide the group through a dangerous landscape. His steadiness helps anchor the civilians as threats proliferate.

A determined young woman who navigates the island’s dangers with grit. She bonds with Cal and Nicky, often driving the group forward, and plays a key role in surviving the vipers’ onslaught. Her resolve under pressure keeps the team focused.

Maggie’s father who becomes entangled in the island’s chaos and forms protective bonds with others. He makes selfless moves to safeguard his family and fellow townspeople, culminating in a fatal confrontation that highlights the human cost of the crisis.

Maggie’s estranged mother who undertakes a dangerous search for her daughter. Her courage and determination to reunite with Maggie place her in close peril, culminating in a fatal encounter with the vipers.

A child bitten by a viper who relies on Cal’s quick intervention and medical aid. His condition becomes a focal point that intensifies the urgency to contain the vipers and secure antivenom.

A loyal member of Staffen’s team who aids in viper capture and operations. He is bitten during the chaos, and his fate underscores the price paid by those involved in the scheme.

A town resident who becomes entangled in the crisis, his safety and fate reflect how the outbreak disrupts ordinary lives. He embodies the collective danger that grips the island.

The sheriff who organizes defenses and ultimately sacrifices himself to protect Maggie and others. His leadership provides a beacon of order amid rising anarchy.

A local woman who has a turbulent relationship with Jack and becomes a casualty of the vipers’ rampage. Her death underscores the island’s high personal cost.

A scientist on the bioscience side who contributes to the technical debate around the vipers and the pursuit of a cure. His role highlights the mix of intelligence and ambition in the facility.

A local woman who moves through the crisis as urgency intensifies. Her presence marks the breadth of the town’s involvement and resilience during the siege.

A local resident who participates in the town’s response, helping to navigate the crisis and support others in peril.

A local resident who contributes to the collective effort to survive the vipers’ onslaught, adding to the island’s human mosaic under pressure.