Maureen Riscoe as Julie McKelvin

Charles Clapham as Col. Peabody

John Le Mesurier as Ginter

John Barry as Geoffrey Dent

Ian Fleming as Insp. McKelvin

Ivan Craig as Tony

Peter Madden as Sgt. Bex

Tony Doonan as Suspect (uncredited)

Blanche Fothergill as (uncredited)

Sonya O'Shea as (uncredited)