How many movies have Jim Backus and Merv Griffin acted in together?

They have worked on 2 movies together! Their first movie together was Hello Down There (1969) and was their highest rated movie together. They have not worked together since Slapstick (Of Another Kind) (1982).

Slapstick (Of Another Kind) (1982)

Role
President of the U.S.
Role
Anchorma

Hello Down There (1969)

Role
T.R. Hollister
Role
Himself