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