Conan O’Brien dropped in on Late Night‘s Jimmy Fallon last night, making his first live return to NBC since he was Zucker-ed in February 2010. He came by to pick up something he said he “left in the couch” — Triumph The Insult Comic Dog, which he’s contractually forbidden from using on his TBS show, along with some other intellectual property from NBC’s Late Night and The Tonight Show. Free the foul-mouthed pooch!

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