John Cater

as Man in Crowd (uncredited)

as Professor Hieronymous Grost

as Thomas

as Blackall

as 1st Gentleman

as Grumpy Joe

as Bernie

as Arnold Pepperell

as Siddie's Husband

as Joe Astler

as Maurice

as George

as Jack Pearce

as Norman

as Tommy

as Professor Krimpton

as Captain Rider (uncredited)

as Captain Rider

as Skebbins

as Olliphant

as Bernard

as Alec Slemen

as Augustus Colpoys