The late and acclaimed director Rob Reiner created some of the most beloved films of the past four decades including 'Stand By Me,' 'When Harry Met Sally' and, of course, 'This is Spinal Tap.' 

In the fall of 2025, Reiner joined The Treatment for an extensive conversation ahead of the release of what would be his final film: 'Spinal Tap II: The End Continues.' 

'This is Spinal Tap' ushered in an era of mockumentaries starring Christopher Guest, Michael McKean, and Harry Shearer. They were masters of improv and accomplished musicians. Reiner spoke about the actors’ authentic musical talents, he revealed his character Marty DiBergi’s hilarious backstory, and he recounted the real life rockers who saw themselves in the fictional band.  

This episode originally ran on September 13, 2025.