A bitterly jealous sponge fisherman tries to sabotage a fellow diver.
| Actor | Role |
|---|---|
 Lon Chaney Jr.Mr. Demitri (as Lon Chaney) | Mr. Demitri (as Lon Chaney) |
 Arthur LakePete | Pete |
 Lloyd BridgesRay Douglas | Ray Douglas |
 John QualenCapt. Athos | Capt. Athos |
 Dickie MooreGeorge Athos | George Athos |
 Eric FeldaryAlex | Alex |
 Ian MacDonaldNick | Nick |
 Tanis ChandlerSimi | Simi |
 Harry CheshireUncle Mike | Uncle Mike |