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'That Guy': Hollywood's Nameless Faces

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Martin Mull

You know, that guy with the mustache that played Roseanne's gay boss on "Roseanne"! He was the school administrator on "Sabrina, the Teenage Witch." He was Colonel Mustard in "Clue"! That's that guy. —XFINITY Entertainment Staff (Photo by Frederick M. Brown/Getty Images)

The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.

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