How many movies have Arturo Toscanini and Dennis Harbour acted in together?

They have worked on 1 movie together! Their first movie together was Toscanini: The Television Concerts, Vol. 5: Verdi: Aida (1949) and was their highest rated movie together. They have not worked together since Toscanini: The Television Concerts, Vol. 5: Verdi: Aida (1949).