CBS is going all out for the conclusion of The Big Bang Theory.


The network has slotted Unraveling the Mystery: A Big Bang Farewell to air Thursday, May 16, the night of the highly anticipated series finale of the hit comedy. The 30-minute special will air at 9:30 p.m. ET/PT, following Big Bang Theory's hourlong series ender (airing at 8 p.m.) and the season-two finale of the prequel spinoff Young Sheldon.


Big Bang Theory stars Johnny Galecki (who plays Leonard) and Kaley Cuoco (Penny) will host the special, which will take viewers behind the scenes of the show that will wrap its 12-season run as TV's longest-running multicamera comedy series. (Big Bang Theory will have aired an impressive 279 total episodes when it wraps.)


The special will include backstage secrets, personal memories, interviews and a tour of the iconic set.


"You're not going to not know it's coming! We will support it heavily and celebrate it. It's been 12 amazing years and hundreds of millions of viewers. It's been a special show for me and everybody at CBS. These kinds of shows don't come along that often. We want to give it the proper respect it deserves on its way into the sunset," CBS president Kelly Kahl said in January of his network's plans for the show's endgame.


The entire cast of Big Bang Theory — including Galecki, Cuoco, Jim Parsons (Sheldon), Simon Helberg (Howard), Kunal Nayyar (Raj), Mayim Bialik (Amy) and Melissa Rauch (Bernadette) — is also slated to appear on CBS' The Late Show With Stephen Colbert on May 16.