DC Comics and WBTV are doing very well for themselves on television, basically with their CW shared universe series, the Flash and Arrow. Arrow is going strong on air and The Flash is showing impressive ratings on its debut in its first year, both series are presently successful on their own, while giving fans two various versions of superhero TV. It should come as no surprise, then that the two DC superheroes' crossover is a very big deal to fans.

Here is the synopsis of Part 1 "Flash vs. Arrow"

"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. 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."

Part 2 The Brave and The Bold"

"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.

Fans are curious about the awkward things Felicity says when she is lodged between her two fighting crushes, Barry and Oliver. It will be just as curious to see if, between the two groups, anyone starts to be suspicious about Dr. Wells' played by Tom Cavanagh purposes are less than dignified.