In June of 1977, the group was photographed with Darth Vader (as played by touring model Kermit Eller). Sometime later, Grace Slick met Mark Hamill backstage at a concert, where she introduced herself as "Darth Vader's wife." By 1978, Creach and Slick had departed from the group. It was during this period that the group performed in The Star Wars Holiday Special. Balin and Barbata soon departed the group as well.