Go-to, middle-aged authority-figure Bob Gunton has only made one kids' show appearance, but he's been in a few shows that masquerade as one.

Gunton played Chief Kirby in the direct-to-video title "Sesame Street Visits the Firehouse" (1990), wherein the Sesame Street gang, well, visits a firehouse.

He has, however, appeared in a couple of grown-up shows pretending to be kids' shows, starting with "Greg the Bunny."

The cult-favorite comedy show only made one season on Fox, though it was revived a few years later for a series of film parodies on IFC.

Gunton appeared in every episode of the Fox series as Junction Jack, the cranky human host of the show-within-a-show "Sweetknuckle Junction" who frequently told anti-puppet jokes off-screen. Because, you see, in the world of "Greg the Bunny" puppets are independent, sentient beings who are treated as a disadvantaged minority by the rest of society.

Gunton also appeared in the "Greg the Bunny" spin-off series "Warren the Ape." 

His only other kid-friendly experience -- though not a proper "appearance" was providing a guest voice in an episode of the animated series "The Batman," in the 2007 episode "Riddler's Revenge."

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