Montgomery Clift as Fr. Michael William Logan

Anne Baxter as Ruth Grandfort

Karl Malden as Inspector Larrue

Brian Aherne as Willy Robertson

O.E. Hasse as Otto Keller

Roger Dann as Pierre Grandfort

Dolly Haas as Alma Keller

Charles Andre as Father Millars

Nan Boardman as Maid (uncredited)

Henry Corden as Det. Sgt. Farouche (uncredited)

Alfred Hitchcock as Man Crossing the Top of Long Staircase (uncredited)

Ovila Légaré as Monsieur Villette (uncredited)

Gilles Pelletier as Father Benoit (uncredited)

Judson Pratt as Murphy (uncredited)