Mel Brooks and Carl Reiner on their 70-year friendship
Carl Reiner and Mel Brooks also appear in an episode of Jerry Seinfeld's Comedians in Cars getting Coffee. It can be found, officially, on Netflix in the "Light and Sweet" season: https://www.netflix.com/title/80171362.As I recall, the episode was initially just focused on Carl Reiner, but Seinfeld was invited back later that evening to join Reiner and Brooks for dinner.