The Grinder: Caroline Rhea to guest-star on Rob Lowe comedy

You already know that Jenna Fischer and Chris Klein will guest-star in an upcoming installment of The Grinder, but now know this: Caroline Rhea has a role in that episode, too.

The stand-up/actress will pop up in the show within the show, but this time instead of it being The Grinder, the hit legal drama starring Dean Sanderson (Lowe), she’ll appear in a series from early in Dean’s career: the multi-camera sitcom Fran of the House. In this episode of Fran of the House, Fran calls the “hot mechanic” (played by Dean) to fix the heater in her home, as her house has gotten so cold, her wine has frozen. Her reasoning for calling a car mechanic for a home problem is simple: He’s hot, and cars have heaters as well, so he should be able to fix it.

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The flashback-heavy episode — which is slated to air March 15 on Fox — features Fischer as Dean’s (now ex-)fiancée, Kelly, and Klein as Dean’s acting buddy Benji.

Rhea, who appeared last year on Two Broke Girls, starred in Sabrina the Teenage Witch for six seasons. She also served as a panelist on Hollywood Squares, hosted her own daytime talk show The Caroline Rhea Show, emceed The Biggest Loser for its first three seasons, and voiced a character on the animated Disney Channel series Phineas and Ferb.