How many movies have Robert McNamara and Wolfgang Preiss acted in together?

They have worked on 1 movie together! Their first movie together was Death on a Rainy Day (1967) and was their highest rated movie together. They have not worked together since Death on a Rainy Day (1967).

Role
Himself - 1960-1968 Secretary of Defense (archive footage) (uncredited)
Role
Dr. Angus Cromwell