Black Sabbath had left the band. Walker, who was at that time fronting a band called Mistress, flew to Birmingham from California in late 1977 to write material and rehearse with Black Sabbath. On 8 January 1978, Black Sabbath made their only live performance with Walker on vocals, playing an early version of the song "Junior's Eyes" on the BBC Television programme "Look! Hear!" Walker later recalled that while in Birmingham he had bumped into Osbourne in a pub and came to the conclusion that Osbourne was not fully committed to leaving Black Sabbath. "The last Sabbath albums were just very depressing
Heaven & Hell Tour on this tour as a sideman. For a portion of the North American tour, which was popularly known as the "Black and Blue Tour", Black Sabbath co-headlined with Blue Öyster Cult, with whom they shared a manager, Sandy Pearlman. The arrangement reportedly set attendance records but caused friction between the two bands as well as between Black Sabbath and Pearlman. In April 1980, Black Sabbath released "Heaven and Hell", the band's ninth studio album and first with former Rainbow and Elf lead singer, Ronnie James Dio, who was hired to replace original lead singer, Ozzy Osbourne. The band began the