As you might already know, John Green was a guest on the Late Late Show with Craig Ferguson, who cancelled his last guest so he could talk to John more. Poor John had to break his own rule of not flying anywhere for six months to be on the show, but I loved that he was a good sport about it. You can watch the whole show on Youtube by following the link below, or the link below that is just the part with just John.
Whole episode: [link]
Only John Green: [link]