How many movies have Henri Gruel and Nic Broca collaborated on?

They have worked on 3 movies together! Their first movie together was Tintin and the Temple of the Sun (1969) while their highest rated movie together was Lucky Luke: The Ballad of the Daltons (1978). They have not worked together since Lucky Luke: The Ballad of the Daltons (1978). They are most known for their animation films together.