Jason (voice) (uncredited)
Narrator
David Ross
Third Officer Charles Groves
Dr. Peter Brady / Invisible Man (voice) (uncredited)
Nick
Dr. Peter Brady / Invisible Man
Flight Lieutenant J. F. Leggo, D.F.C.
Officer (line of men in sea) (uncredited)
Artist (uncredited)
Lieutenant John Wynham
British Sergeant
Rupert
Dutch Lieutenant
