It seems sci-fi star Nathan Fillion has taken a break from filming his hit series Castle to put the moves on a certain member of the Muppets.

One of the most intriguing new shows of the fall stars a gaggle of decades-old puppets, and several new promos show off the zany shenanigans going on behind the scenes. To show off the 30 Rock-esque tone they’ll be taking with the series, which focuses on the “real” lives of the Muppets as they work to film a new series, the studio has dropped nine new promos loaded with celebrity cameos.

The nine promo clips feature Nathan Fillion, Kerry Washington, Patricia Heaton, Tracee Ellis Ross and the cast of Fresh Off the Boat. But Captain Tight Pants absolutely steals the show. Built into the several different teaser clips is a tiny subplot that sees Fillion putting the moves on Miss Piggy — and Kermit is none too happy about it.

Check out the teaser clips below and let us know what you think:

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The Muppets premieres Sept. 22 on ABC.

(Via Collider)