How many movies have George Sewell and Michael Billington acted in together?

They have worked on 2 movies together! Their first movie together was UFO... annientare S.H.A.D.O. Stop. Uccidete Straker... (1972) while their highest rated movie together was UFO - Contatto radar... stanno atterrando! (1974). They have not worked together since UFO - Contatto radar... stanno atterrando! (1974).