Actor John Bromfield starred as Captain Brannigan and Lon Chaney Jr. played the role of Swede.

Exchanging credentials with a Jamaican Inspector, Warren reveals he has come to seek the extradition of a wanted criminal known as "The Professor".

During a drunken evening out Brannigan is attracted to a woman sitting with an older man called "the Professor" with the two brawling over her.

During the brief fracas Brannigan notices the Professor is wearing an unusual heavy ring of a skull and cross bones.

He breaks it open on board finding a ripped piece of paper dated 1793 with nonsensical French written on it, but inside the bottle is the same ring that the Professor wears.