The Dark Crystal
The Dark Crystal is a 1982 high fantasy adventure film directed by Jim Henson and Frank Oz and stars the voices of Stephen Garlick, Lisa Maxwell, Billie Whitelaw, Percy Edwards, and Barry Dennen. The film was a joint British-American venture produced by ITC Entertainment and Henson Associates and distributed by Universal Pictures. The plot revolves around Jen, an elf-like "Gelfling" on a quest to restore balance to his alien world by returning the lost shard of a powerful but broken gem.
It was marketed as a family film but was notably darker than the creators' previous material.