In the season six premiere TMS pays tribute to metal god and icon Ronnie James Dio; Geezer Butler and Vinny Appice from Black Sabbath and Heaven and Hell talk about the passing of Ronnie James Dio; Wendy Dio talks about how she met Ronnie James Dio and their marriage; Rob Halford and Tom Morello talk about the musical influences Ronnie James Dio have had on them; in the Throwdown the hosts, Halford and Morello debate which Ronnie James Dio band was the best: Rainbow or Black Sabbath; and Craig Goldy, former Dio guitarist, is featured as the guest guitarist.