The CW has released the official descriptions for the upcoming Arrow and The Flash crossover episodes. These episodes will air in the first week of December. The Flash episode titled, “The Flash vs Arrow,” will premiere on Tuesday, December 2 at 8pm ET/7pm CT and the Arrow episode, “The Brave and The Bold” will air on Wednesday, December 3rd at 8pm ET/7pm CT. From the descriptions it looks like Digger Harkness, aka Captain Boomerang will be the reason that ties these two shows together in their 2-part crossover. Captain Boomerang is a DC Comics super-villain that is a member of the Rogues and has been a reluctant member of the Suicide Squad too. You can check out the official descriptions for these episodes below, then look for them to premiere in just under 3 weeks.
PART ONE OF THE EPIC CROSSOVER EVENT WITH THE FLASH AND ARROW — Barry (Grant Gustin) is thrilled when Oliver (guest star Stephen Amell), Felicity (guest star Emily Bett Rickards) and Diggle (guest star David Ramsey) 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, 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 (Candice Patton) is furious when Eddie (Rick Cosnett) tries to get a task force to stop The Flash, Joe and Dr. Wells (Tom Cavanagh) agree the Arrow is a bad influence on Barry, and Caitlin and Cisco deal with a new team in S.T.A.R. Labs. Glen Winter directed the episode with story by Greg Berlanti & Andrew Kreisberg and teleplay by Ben Sokolowski & Brooke Eikmeier (#107). Original airdate 12/2/2014.
PART TWO OF THE ARROW AND FLASH CROSSOVER EVENT — Oliver (Stephen Amell), Arsenal (Colton Haynes) and Diggle (David Ramsey) 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 (guest star Audrey Marie Anderson) 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 (guest star Grant Gustin). 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 (#308). Original airdate 12/3/2014.