Capt. John Holling

Lila Kane

Major Pope

Inspector Von Kessling

Prof. Grimson

First Officer Cliff Rogers

Granny Plimpton

Capt. Downey

Dr. Howard

Edgar Morton

Watson

Joe, the Watchman

Simms, the Steward

Spy Chief (uncredited)

Commander Bryson (uncredited)

Grimson's Aide (uncredited)

Waiter (uncredited)

Aide (uncredited)

Crewman (uncredited)

Directing

Production

Writing

Writing

Camera

Sound