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