9. Joe Franklin

Before Paar, Carson, Letterman, Leno and Fallon there was Joe Franklin. The talk show legend and showbiz historian is listed in the Guinness Book of World Records as the host of the longest running talk show in history (43 years and 300,000 guests, give or take) and often credited with inventing the format itself. Gilbert and Frank dropped in on Joe's infamously cluttered (an understatement!) Times Square office to nosh on chicken salad, dodge falling stacks of collectibles and ask the "King of Nostalgia" about his memories of Charlie Chaplin, Woody Allen, Buster Keaton, Frank Sinatra, Barbra Streisand and John Lennon (to name but a few).