Frank Zappa – guitar, organ, vocals
Jimmy Carl Black – percussion, drums
Roy Estrada – bass, backing vocals, Pachuco rap on "WPLJ"
Janet Ferguson – backing vocals on "WPLJ"
Bunk Gardner – wind
Buzz Gardner - trumpet
Billy Mundi – drums (uncredited, left group in December 1967, pictured on gatefold cover and possibly played on "Theme from Burnt Weeny Sandwich")
Lowell George – guitar, vocals
Don "Sugarcane" Harris – violin on "The Little House I Used to Live In"
Don Preston – piano, keyboards
Jim Sherwood – wind
Art Tripp – drums, percussion
Ian Underwood – piano, keyboards, wind
John Balkin – bass on "WPLJ", string bass on "Overture to a Holiday in Berlin"