An Iron Man 2 story was derailed last night when Robert Downey Jr. became concerned by David Letterman's characterization of his co-star Mickey Rourke. Luckily, the two men are nothing if not tactful and the situation resolved itself rather neatly, like the end of a Wodehouse novel. In other matters of civility, Michael Caine told Jimmy Fallon about what he wanted to say to the Queen during his knighthood ceremony, but thankfully didn't, and Jon Stewart made an impassioned plea to Apple about their mishandling of the iPhone 4G investigation. Finally, Stephen Colbert took a hallucinogen on his show and was greeted by an ideal spirit guide: comedian Eugene Mirman. Watch our compilation to see what you missed.