Michael Spiro – percussions sur "Me and Me", "Fox Face", "Rearrange My Face" sur "Bikini Atoll"
Dale Strumpel – effets sonores sur "All the Machines" et "Bikini Atoll"
Sean Hopper, Paul Kantner – chœurs sur "All the Machines" and "It Just Won't Stop"
John Colla, Mickey Thomas – chœurs sur "Call It Right Call It Wrong", "Me and Me", "All the Machines", "Through the Window", "It Just Won't Stop" et "Rearrange My Face"