In Arrow 308 as the team track down the location of a boomerang-wielding killer named Digger Harkness they get help in the fight from an old friend, The Flash.

Check out the clip above, screening comments from cast / producer and the lowdown below. The episode airs on December 3rd, 2014 on the CW network. In the UK this episode is expected to air on December 18th, 2014 at 9pm.

The series stars Stephen Amell, Willa Holland, Colton Haynes, David Ramsey, Katie Cassidy, Susanna Thompson, Paul Blackthorne and Austin Butler. Guest stars Nick E Tarabay, Audrey Marie Anderson and Grant Gustin!

Arrow 308 – Screening, Stars and Producers

Arrow 307 – Official Information

Season 3: “The Brave and the Bold”

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 E 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.