Thunder Afloat

A tugboat captain serves under his rival as a U-boat chaser in World War I.

• George B. SeitzDirector
• Harvey S. HaislipScreenplay
• Wells RootScreenplay

• Wallace BeeryJohn Thorson
• Chester Morris'Rocky' Blake
• Virginia GreySusan Thorson
• Douglass DumbrilleDistrict Commander
• Carl EsmondU-Boat Captain
• Clem Bevans'Cap' Finch
• John QualenMilo
• Regis ToomeyIves
• Henry VictorGerman U-Boat Officer
• Addison RichardsAdmiral Ross
• Hans JobyU-Boat Petty Officer
• Henry HunterEnsign Dyer