On 'Anderson Cooper 360' (weeknights, 10PM ET on CNN), producers pranked Anderson Cooper with highly embarrassing video of an appearance he made on 'To Tell the Truth' as a child.

While correspondent Isha Sesay read a story on Marg Helgenberger's recent swipe at Justin Bieber, producers surreptitiously inserted a still from the video that showed young Cooper in a furry, purple wig. "Why was that picture up there? Wait a minute," said Cooper. "How did ...? Where did this picture suddenly materialize from?"

Staffers in the control room claimed the photo was a "technical glitch," but Cooper didn't buy it. "I don't believe that for a second," he said. "I'm not hearing anything. I'm just thinking about people I'm going to fire."