John Meillon as Maurice 'Pop' Pym

Rod Taylor as Palmer

John Ewart as Freddie Graves

Judy Morris as Miss Lockhart

Garry McDonald as Lou

Harold Hopkins as Larry

Jeanie Drynan as Mrs Duncan

Sally Conabere as Lucy

Patrick Cargill as Fitzwilliam

Jelena Žigon as Madame Cavalli (as Yelena Zignon)

Tony Barry as Policeman