How many movies have Hans Billian and Steve Graham collaborated on?

They have worked on 2 movies together! Their first movie together was Josefine Mutzenbacher - Manche mögen's heiß (1991) while their highest rated movie together was Familie Immerscharf 6 - Die Sex-Lawine (1996). They have not worked together since Familie Immerscharf 6 - Die Sex-Lawine (1996).