Frank Zappa - Who Are The Brain Police? - 1971, Duesseldorf (audio)

Duesseldorf, Rheinhalle, 1971-11-23. Audience recording.

Frank Zappa - lead guitar, lead vocals, band leader
Howard Kaylan - vocals
Mark Volman - vocals, guitar
Don Preston - keyboards
Ian Underwood - alto saxophone, keyboards
Jim Pons - bass, vocals
Aynsley Dunbar - drums