Hamburg

Nils Unger, communist from Hamburg

Suzie, Unger's wife

Franz Buk, traitor

Elsner, worker

Elfrida

Willie, driver

Investigator

Police president

Pfeiffer, detective

Madman

Meiss, social-democrat

Judge

Officer (uncredited)

Burgomaster

Head of Senate

Louise, prostitute

Oksen, doctor

Barfus

Detective

Frau Dart

Social-democrat

Lieutenant Lange