The episode from 1987 with four-year-old spelling bee star Rohan Varavadekar. The interview is both hilarious and makes you go "Awwww". Especially the moment when Rohan invites Johnny to his fifth birthday party.
From Johnny Carson's run; the night before his final show, Bette Miller serenades him with a performance of "One More For the Road."
Johnny's final show itself - "I bid you a very heartfelt goodnight."
Conan O'Brien's era:
When Conan told about his concussion, he thanked Andy for riding with him to the hospital and keeping him company while he recovered.