SpongeBob SquarePants meets Mad Men: See Jon Hamm as Don Grouper

Mad Men type TV Show network AMC

Jon Hamm is returning to his acclaimed Mad Men role of Don Draper!

Oh, wait a sec. Read that wrong. He’s actually playing Don Grouper.

The Emmy and Golden Globe-winning actor is sending up his most iconic gig on SpongeBob SquarePants next month, voicing the smart, charming, and literally fishy ad exec Don Grouper, whose firm is hired by Mr. Krabs to help sell his frozen Krabby Patties. Below, check out the trailer for the half-hour special, “Goodbye, Krabby Patty?,” which reimagines Mad Men‘s falling-Don opening credits in the Sponge-verse. The special airs Feb. 20 at 7 p.m. ET/PT on Nickelodeon.

Since Mad Men ended, Hamm has popped up on The Last Man on Earth, Unbreakable Kimmy Schmidt, Wet Hot American Summer: First Day of Camp, and Angie Tribeca. He stars in the AI drama Marjorie Prime, which premiered at Sundance.

SpongeBob — which debuted in 1999 and stands as the network’s longest-running animated series — has recently featured vocal contributions from such celebrities as Betty White, Aubrey Plaza, Bob Barker, and Henry Winkler.