How many movies have Erich Engels and Rudolf Fernau collaborated on?

They have worked on 5 movies together! Their first movie together was Im Namen des Volkes (1939) while their highest rated movie together was Doctor Crippen (1942). They have not worked together since Im Namen einer Mutter (1960). They are most known for their drama films together.

Crew
Director
Role
Dr. Frank Crippen
Crew
Writer