Frankie Avalon as Chris

Jill Haworth as Sheila

Dennis Price as Inspector Bill Bradley

Mark Wynter as Gary Scott

George Sewell as Bob Kellett

Gina Warwick as Sylvia Fuller

Richard O'Sullivan as Peter

Carol Dilworth as Dorothy Pulman

Julian Barnes as Richard

Veronica Doran as Madge

Robin Stewart as Henry

Jan Holden as Peggy

Clifford Earl as Sgt Pelley

Robert Raglan as John Bradley

Vicki Michelle as Sally (uncredited)

Nicholas Young as Party Guest (uncredited)