Have been doing some heavy M&P's research recently and just came across this description of the first episode of Denny's Sho*
Jun 1, 1978 - Debut. The series gets off to a roaring opener as it's the first public reunion of the Mamas and the Papas (minus, of course, the late Mama Cass Elliott). Present, with Denny, are John and Michelle Phillips. Highlights: "Monday, Monday," "California Dreamin'," "Creeque Alley," "Dancing Bear," "One Morning in May" (Denny, Michelle, John); "Victim of Romance" (Michelle); "Zulu" (John); "You Can't Tell a Book by Its Cover" (Denny).
Please someone tell me that this video still exists!