Margaret Lockwood as Iris Matilda Henderson

Michael Redgrave as Gilbert Redman

Paul Lukas as Dr. Hartz

May Whitty as Miss Froy

Basil Radford as Charters

Naunton Wayne as Caldicott

Cecil Parker as Eric Todhunter

Linden Travers as 'Mrs.' Margaret Todhunter

Mary Clare as Baroness Isabel Nisatona

Emile Boreo as Boris the Hotel Manager

Googie Withers as Blanche

Sally Stewart as Julie

Philip Leaver as Signor Doppo

Selma Vaz Dias as Signora Doppo

Catherine Lacey as The Nun

Josephine Wilson as Madame Kummer

Charles Oliver as The Officer

Kathleen Tremaine as Anna

Ernest Blyth as Foreign Office Man (uncredited)

Alfred Hitchcock as Man in London Railway Station (uncredited)

Roy Russell as Violinist (uncredited)

Wallace Bosco as Gasthof Petrus Guest (uncredited)

Alf Casha as Gasthof Petrus Guest (uncredited)

Nan Kearns as Dancing Woman (uncredited)

John Miller as Rudolf - Gasthof Waiter (uncredited)

John More as Passenger in Dining Car (uncredited)

Charles Rolfe as Train Fireman (uncredited)