Cruising The Abyss — Episode 4

Billionaire Jack hides as poor son-in-law testing his wife, but catches her cheating with a tycoon buying an alien parasite. His warnings earn him abuse and divorce. It breeds uncontrollably, a slaughterhouse at sea. The mutated tycoon unleashes it to threaten humanity. When his sister arrives, identity exposed, all realize he's their only hope.