Nathan Fillion does hairpiece tricks on 'Late Show with David Letterman'

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"Castle" star Nathan Fillion is a man of many talents, but you might not know just how impressive his hair is. During a "Late Show with David Letterman" appearance, the host joked with Fillion about his "hairpiece."

"I love that you love that," Fillion says as he does his own stupid human trick, which involves quite a bit of control over his hairline. "I can't tell you how rewarding it is for me that something I wasted time on as a child, no one said to me, 'Don't worry, when you're in your 40s that's going to pay off on David Letterman.'"
Photo/Video credit: CBS