as Crewman (uncredited)
as 1st Reporter
as Dutch Lieutenant
as Jason (voice) (uncredited)
as Flight Lieutenant J. F. Leggo, D.F.C.
as Officer (line of men in sea) (uncredited)
as British Sergeant
as Rupert
as Alvarez - racer
as Artist (uncredited)
as Third Officer Charles Groves
as Dr. Kenneth McColl
as Tommy Dykes
as Frank Mason
as Peter
as Self - Commentator
as Narrator
as Commentator
as Dr. Peter Brady / Invisible Man (voice) (uncredited)
as Nick
as Dr. Peter Brady / Invisible Man
as Lieutenant John Wynham
