S1, E12: In this very special episode, Spectacle host Elvis Costello recuses himself from the proceedings when his wife, Diana Krall, turns up as the featured guest. Spectacle Executive Producer Sir Elton John (who also dabbles in music) steps into the breach to conduct his first-ever interview. Sharing their love of piano (where the interview takes place), jazz, sad songs and great singers, Diana and Elton engage in playful banter, explore some history and even team up for a duet on one of Elton's biggest hits. The very talented Christian McBride (bass) and Karriem Riggins (drums) join Diana on a couple of extraordinary performances, while Elvis starts the proceedings with the same exquisite rhythm section on his own song "Almost Blue", and then shows up at the end to join his wife and Elton for a funny and charming closing number.