John Stacy

as Prof. Grabowski

as Zookeeper #1

as Professor Chesi

as il portiere dell'albergo

as Concierge

as banchiere

as Hotel Doorman in Paris

as Herbert Peters

as American Consul (uncredited)

as Il Lord

as Lord Chamberlain

as Don Alfredo

as Prof. Henry Wassermann

as Innkeeper (uncredited)

as Silvane (uncredited)

as Bill Stryker

as Zio di De Espinosa

as Dr.Andrews

as Colonel Webb

as Porter (uncredited)

as British General

as Surgeon (uncredited)

as ufficiale americano

as Sir Bryan

as Lester's Chief

as Tyboria Captain

as Man reciting repetitive prayers (uncredited)

as Giuliano da Sangallo

as Captain

as Drunken Butler (uncredited)

as Dr. Carini (uncredited)

as Roman Senator

as Dr. Cornfield

as Douglas (uncredited)

as Parker

as Uncle E. Dodds

as Il turista inglese

as maestro

as Signor Guidi