The Big Bang Theory is joining Paramount's Nick at Nite and MTV line-ups in the United States, with both networks planning themed marathons to celebrate its launch.

The show will join Nickelodeon's night-time programming block, Nick at Nite, on December 24 with two days of festive episodes, including the fan-favorite episode The Bath Item Gift Hypothesis, known for the iconic "Leonard Nimoy's Napkin" scene.

Starting December 27, The Big Bang Theory will air daily on Nick at Nite in a two-hour block from 12-2 a.m. (ET/PT). The network will kick off with Season 4, during which Mayim Bialik and Melissa Rauch joined the cast as Amy and Bernadette, respectively.

All twelve seasons of The Big Bang Theory will be added to the Nick at Nite line-up, airing alongside modern sitcom favorites Friends and Modern Family, as well as The Big Bang Theory's prequel series Young Sheldon.

On Wednesday, January 1, MTV will start the New Year with a Bang by airing an all-day marathon of The Big Bang Theory's third season, including popular episodes such as The Adhesive Duck Deficiency and The Staircase Implementation.

Beginning Saturday, January 4, the show will become part of MTV's Saturday and Sunday line-ups, with episodes from all twelve seasons airing alongside Friends.

Since 2011, TBS has been the exclusive home of The Big Bang Theory reruns on cable. The show will continue to air on TBS and in local syndication. The Warner Bros. streaming service Max has been the exclusive home of The Big Bang Theory since its streaming debut in 2020.