Robur
John Strock
Prudent
Dorothy Prudent
Phillip Evans
Alistair
Topage (as Vitto Scotti)
Turner
Man at Balloon Society Meeting (uncredited)
Wilson (uncredited)
Talkative Morgantown Townsman (uncredited)
Weaver (uncredited)
Morgantown Townswoman (uncredited)
Prudent's Butler (uncredited)
Shanks (uncredited)
Morgantown Townsman (uncredited)