Characters played by J. Edward Bromberg
Arnold DeBrock
Characters played by Osa Massen
Valeria DeBrock
Characters played by William Wright
Christopher Waring
Characters played by Margaret Tallichet
Joan Millard
Characters played by Abner Biberman
Carlos Castillo-Martinez
Characters played by Martin Kosleck
Grebb
Henchman
Characters played by Charles D. Brown
Capt. Jonathan Hunt
Characters played by Ivan Miller
Capt. Brigham
Characters played by Roland Varno
Ship's Doctor
Characters played by Sam Ash
Policeman
Characters played by Edward Biby
Ship's Passenger
Characters played by Roy Darmour
Steward
Characters played by Robert Frazer
Detective
Characters played by Dwight Frye
Radio Operator
Characters played by Selmer Jackson
Adm. Curtiss
Characters played by Carl M. Leviness
Ship's Passenger
Characters played by John 'Skins' Miller
Flop-House Night Clerk
Characters played by John Mylong
Von Eltzen
Characters played by William Newell
Second Steward
Characters played by Hugh Prosser
Ship's Purser
Characters played by José Pérez
Bellboy
Characters played by Tim Ryan
First Mate