How many movies have Gary R. Heacock and John Carradine collaborated on?

They have worked on 3 movies together! Their first movie together was The Wizard of Mars (1965) while their highest rated movie together was Gallery of Horror (1967). They have not worked together since The Astro-Zombies (1968). They are most known for their horror films together.

Crew
Screenplay
Role
Narrator / Tristram Halbin
Crew
Associate Producer