Madeleine Carroll as Elsa Carrington

John Gielgud as Richard Ashenden / Edgar Brodie

Peter Lorre as The General

Robert Young as Robert Marvin

Percy Marmont as Caypor

Florence Kahn as Mrs. Caypor

Charles Carson as "R"

Lilli Palmer as Lilli

Denys Blakelock as Man (uncredited)

Sebastian Cabot as Man (uncredited)

Tom Helmore as Colonel Anderson (uncredited)

Andreas Malandrinos as Manager (uncredited)

Howard Marion-Crawford as Karl (uncredited)

Rène Ray as Maid (uncredited)

Michael Redgrave as Army Officer (uncredited)

Michael Rennie as Army Captain (uncredited)

Michel Saint-Denis as Coachman (uncredited)