GGACP celebrates the 40th anniversary of the release of "This Is Spinal Tap"(March 2, 1984) by revisiting this 2016 interview with Emmy-nominated actor-writer and Oscar-nominated musician Michael McKean. In this episode, Michael looks back on his days in the sketch troupe The Credibility Gap, recalls his brief stint at "Saturday Night Live," reveals the amusing origin of Lenny and Squiggy and praises the improvisational cinema of Christopher Guest. Also, Norm Macdonald loses his cool, Spinal Tap meets Joe Franklin, Rod Steiger channels "Il Duce" and Michael and Gilbert compare life mask collections. PLUS: Remembering Zacherle! The genius of Richard Libertini! "Abbott and Costello Go to Mars"! Cannonball Adderley buys the farm! And "The Square, Square World of Dick Conti"!

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