As the band, minus Osbourne, flew back to Los Angeles on September 28 after completing the shows, Gillis played them the demo recordings he had made with Night Ranger that would comprise the band's soon-to-be released debut album, while Sarzo played them the new Quiet Riot recordings he had been working on in secret. Upon arriving in Los Angeles, Sarzo promptly quit Osbourne's band and officially rejoined Quiet Riot, prompting a long and bitter feud with Osbourne that would culminate in the vocalist assaulting him backstage at the US Festival in 1983. Gillis also left Osbourne's band shortly thereafter, returning to Night Ranger weeks later. "Speak of the Devil" represents the only official Osbourne recording to feature the guitarist's work.