Though they won’t be airing until the first week of December, The CW has already released the plot descriptions for the upcoming crossover episodes of “The Flash” and “Arrow” which you can read below. “The Flash” will serve as the first part and goes by the appropriate title “Flash vs. Arrow.” It’s officially described as follows:

“Barry is thrilled when Oliver, Felicity and Diggle come to Central City to investigate a case involving a deadly boomerang. Excited about teaming up with his friend, Barry asks Oliver if hed like to help him stop Ray Bivolo (guest star Patrick Sabongui), the meta-human Barry is currently tracking. Bivolo causes people to lose control of their emotions and has been using that skill to rob banks. Unfortunately, the superhero partnership doesnt go as smoothly as Barry expected. When Oliver tells Barry he still has a lot to learn, Barry sets out to prove him wrong by attempting to stop Bivolo alone. However, when Bivolo infects Barry and sets him on a rage rampage, everyone is in danger, and the only one who can stop him is the Arrow. Meanwhile, Iris is furious when Eddie tries to get a task force to stop The Flash, Joe and Dr. Wells agree the Arrow is a bad influence on Barry, and Caitlin and Cisco deal with a new team in S.T.A.R. Labs.”

The episode is directed by Glen Winter with story by Greg Berlanti & Andrew Kreisberg and teleplay by Ben Sokolowski & Brooke Eikmeier. It’s set to air December 2.

Following that episode, “Arrow” will bring us the conclusion of the crossover with an episode titled “The Brave and The Bold.” It’s officially described as follows:

“Oliver, Arsenal and Diggle track down the location of a boomerang-wielding killer named Digger Harkness (guest star Nick Tarabay) but are surprised when they come face to face with an A.R.G.U.S. team. Diggle asks Lyla why A.R.G.U.S. is involved but she defers until Harkness attacks the building, killing several agents and targeting Lyla. The Arrow joins the fight and gets help from an old friend  The Flash. Harkness manages to get away and Oliver teams up with Barry again to find him before he can get to Lyla. When Harkness plants five bombs in the city that are timed to explode at the same time, both teams must come together to save the city.”

Jesse Warn directed the episode with story by Greg Berlanti & Andrew Kreisberg and teleplay by Marc Guggenheim & Grainne Godfree Schwartz. It’s set to air December 3.

“The Flash” airs Tuesdays at 8 p.m. and “Arrow” airs Wednesdays at 8 p.m., both on The CW.