Guest Stars Nathan Fillion as Alien Interrogator Co Starring Nolan North voices Additional Voices Kari Wahlgren voices Additional Voices Brandon Johnson voices Mr. Goldenfold Maurice LaMarche voices Additional Voices Dan Harmon voices Birdperson Cassie Steele voices Tammy Gueterman Tom Kenny voices Additional Voices Kari Wahlgren voices Diane Sanchez Tom Kenny voices Federation Admiral Tom Kenny voices Conroy Maurice LaMarche voices Federation President Maurice LaMarche voices Gromflomite Engineer Dan Harmon voices McDonald's Employee Nolan North voices Gromflomite Soldier Nolan North voices Gromflomite Commander Brandon Johnson voices Federation Personnel