The Brave and the Bold

"Sometimes bravery isn't enough; sometimes the world requires us to be bold."

- Lyla Michaels to Oliver Queen

"The Brave and the Bold" is the eighth episode of Arrow ' s third season and the fifty-fourth episode overall. The episode acts as the second part of a two-part crossover between The Flash and Arrow, along with the eighth episode of The Flash ' s first season,. It aired on December 3, 2014.

Synopsis
Oliver, Roy, and Diggle track down the location of a boomerang-wielding killer named Digger Harkness 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.

Production
Preparation began September 18 and wrapped up on September 26. Filming ran from September 29 until October 8.

Trivia

 * The episode's title, The Brave and The Bold, is a reference to a number of DC comic book series which featured super-hero team-ups. The Brave and the Bold's most notable characters were Batman, Green Lantern (Hal Jordan), Green Arrow and The Flash (Barry Allen).
 * When Oliver and Barry meet Captain Lance, he calls Barry, Bart. This is a reference to Bart Allen, also known as Impulse and Kid Flash, later to be known as another incarnation of The Flash.
 * The final showdown between Barry and Oliver is a reference to Rocky Balboa and Apollo Creed's final showdown in Rocky III. Both crossovers also made a reference to Rocky.