Lee Parry

as Lee Forbes

Joop van Hulzen

as Dr. John Forbes

Henry Stuart

as Will Carry, ein Sportmäzen

Valerie Boothby

as Mary, Weltmeisterschwimmerin

Hans Adalbert Schlettow

as Tom Wobber, Manager

Gerhard Ritterband

as Robby, sein Gehilfe

Otto Kronburger

as Peter Stanley, Freund von John und Lee