His work for Henson productions included The Storyteller (TV series), Labyrinth (1986 film), The Witches (1990 film), and Dinosaurs (TV Series). Stephenson art directed Jacque Annaud's The Bear (1988 film) and contributed to the film Teenage Mutant Ninja Turtles (1990 film) for which Jim Henson's Creature Shop provided ninja turtle suit puppets.[3]