The cast of ABC’s hit series ‘Modern Family’ is getting an increadibly talented guest-star, Kristen Johnston (“3rd Rock from the Sun”) is set to join the cast as Mitchell’s co-worker Brenda. The new episode is called “Strangers in the Night” and begins when Alex tells Phil and Claire she has a boyfriend, they worry they’ve put too much pressure on her and has made up an imaginary boyfriend.

Jay and Gloria both have parties that they are dragging the other to and Jay has a clever plan to get himself out of it, but Manny just might spoil everything. Mitch and Cam just got a beautiful white couch delivered but when Mitch is stuck helping out Brenda, a distressed co-worker, and allows her to stay – it is a mishap waiting to happen, on “Modern Family,” airing on DECEMBER 3 (9:00-9:31 p.m., ET).

“Modern Family” stars Ed O’Neill as Jay, Julie Bowen as Claire, Ty Burrell as Phil, Sofia Vergara as Gloria, Jesse Tyler Ferguson as Mitchell, Eric Stonestreet as Cameron, Sarah Hyland as Haley, Nolan Gould as Luke, Ariel Winter as Alex, Rico Rodriguez as Manny and Aubrey Anderson-Emmons as Lily.

Guest cast includes Kristen Johnston as Brenda, John Karna as Alec, Yuriy Turchyn as Teddy, Eileen Galindo as Mindy and Marcus Folmer as Photogrpaher. “Strangers in the Night” was written by Chuck Tatham and directed by Fred Savage.