Which Black Sabbath album introduced Tony Martin as lead vocalist?

Which Black Sabbath album introduced Tony Martin as lead vocalist? The Eternal Idol did.

Released in 1987, The Eternal Idol marked Tony Martin's debut as Black Sabbath's principal studio vocalist. His arrival followed a turbulent recording process: Ray Gillen had initially recorded the vocals, but left before the album was completed. Martin was then brought in to re-record the vocal parts under producer Chris Tsangarides.

That history can create a common mix-up. The album's expanded editions include sessions featuring Gillen, but the original finished release is identified with Martin. Its credited lineup also included Tony Iommi on guitar, Geoff Nicholls on keyboards, Bob Daisley on bass, and Eric Singer on drums. Martin would become the band's longest-serving vocalist outside the Ozzy Osbourne era.

The album was released in November 1987 and followed Seventh Star. It was not a major commercial success, peaking at number 66 in the United Kingdom and number 168 in the United States. Martin's tenure continued through Headless Cross, Tyr, Cross Purposes, and Forbidden, although he did not sing on every subsequent Sabbath release.