Joseph Cotten

as Baron Otto von Kleist / Alfred Becker

Elke Sommer

as Eva Arnold

Massimo Girotti

as Dr. Karl Hummel

Antonio Cantafora

as Peter Kleist

Umberto Raho

as Inspector

Luciano Pigozzi

as Fritz

Nicoletta Elmi

as Gretchen Hummel

Dieter Tressler

as Mayor Dortmundt