How many movies have Howard F. Flynn and William Conrad acted in together?

They have worked on 1 movie together! Their first movie together was Buck Rogers in the 25th Century (1979) and was their highest rated movie together. They have not worked together since Buck Rogers in the 25th Century (1979).

Role
Dr. Theopolis (voice)
Role
Opening Narrator / Draconian officer (uncredited) (voice)