"Blue Harvest" guest starred Chevy Chase, Beverly D'Angelo, Mick Hucknall, and Rush Limbaugh.The episode also included recurring voice actors Lori Alan, Adam West, Ralph Garman, Danny Smith, John Viener, Steve Callaghan, Kirker Butler, Mark Hentemann, Johnny Brennan, Jon Benjamin, Phil LaMarr, and Wally Wingert.