Comedy-mystery finds Detectives Kelly and Dempsey trapped in a deserted lighthouse with a group of strangers who are being terrorized by a killer octopus AND a mysterious crime figure named after the title sea creature.
| Actor | Role |
|---|---|
 Hugh HerbertKelly | Kelly |
 Allen JenkinsDempsey | Dempsey |
 Marcia RalstonVesta Vernoff | Vesta Vernoff |
 John EldredgePaul Morgan | Paul Morgan |
| GGeorge RosenerCapt. Hook | Capt. Hook |
 Brandon TynanCaptain Cobb | Captain Cobb |
| EEric StanleyDavid Dow Harriman | David Dow Harriman |
 Margaret IrvingPolly Crane | Polly Crane |
 Elspeth DudgeonNanny | Nanny |