All The Brothers Were Valiant

Sailor Joel Shore (Robert Taylor) goes looking for his whale hunter brother, Mark (Stewart Granger), who is lost during a disastrous mission at sea. Joel and his wife, Priscilla (Ann Blyth), eventually catch up with Mark on a tropical island -- but, to their surprise, misfortune and tragedy have transformed him into a troubled, desperate man. Before long, Mark begins to pursue a romantic relationship with Priscilla, leading to vicious sibling rivalry and a violent mutiny.