Tom Hennesy

as Hilly

as Mr. Sweet (uncredited)

as Bartender (uncredited)

as Buck Langhorn (uncredited)

as Gordo - Graile's Bodyguard (uncredited)

as Bull (uncredited)

as The Gill Man (on land) / Marineland Diver (uncredited)

as Cadet Dotson (uncredited)

as Board Member (uncredited)