An island blows up, and from its remains a black poison fills the ocean. A team of underwater specialists with high-tech gear have to stop the poison before it contaminates the earth, but things get increasingly bizarre the more they investigate.
| Actor | Role |
|---|---|
 Parker StevensonJohn Alden | John Alden |
| MMehgan Heaney-GrierAlyssa Meade | Alyssa Meade |
 Billy RieckBilly Domino | Billy Domino |
 Shelli LetherLt. Cmdr. Stephanie Chase | Lt. Cmdr. Stephanie Chase |
 Krista AllenDr. Katherine 'K' Harrison | Dr. Katherine 'K' Harrison |
 Matt BattagliaPete Trudeau | Pete Trudeau |
 Lewis SmithCommander Frank Stein | Commander Frank Stein |
 Samantha SmithDr. Hannah Nygaard | Dr. Hannah Nygaard |
 Rosa BlasiCarolina Marquez | Carolina Marquez |
 Sherman AugustusCaptain Matthew Norris | Captain Matthew Norris |
| LLeigh HetheringtonJilly | Jilly |
| MMerlin de MartinisRusty Potter | Rusty Potter |
| JJeff CampbellInstitute Officer | Institute Officer |
| LLouie RiveraLeader | Leader |