Chicago: Robert Lamm (vocals, piano, Fender Rhodes piano, Clavinet, Mellotron, keyboards, ARP synthesizer); Peter Cetera (vocals, bass); Terry Kath (guitar, bass, background vocals); Walter Parazaider (flute, soprano saxophone, alto saxophone, tenor saxophone); Lee Loughnane (trumpet, flugelhorn); James Pankow (trombone, timbales, percussion, background vocals); Danny Seraphine (drums, percussion).

Additional personnel includes: Laudir DeOliviera (congas, percussion); The Pointer Sisters (background vocals).

Recorded at Sound Labs, Hollywood, California and Caribou Ranch, Nederland, Colorado between August & December 1973. Originally released on Columbia (32810). Includes liner notes by Phil Gallo.

All tracks have been digitally remastered.