Earlier this week, CW released photos from The Flash portion of the crossover between The Flash and Arrow, and now we have the Arrow side of the equation. The Flash: "Flash Vs. Arrow" Photos The night after Oliver Queen (Stephen Amell), Felicity Smoak (Emily Bett Rickards) and John Diggle (David Ramsey) visit Central City on The Flash, the December 3rd episode of Arrow will find Barry Allen (Grant Gustin), Caitlin Snow (Danielle Panabaker) and Cisco Ramon (Carlos Valdez) head to Starling City - where Digger Harkness, AKA Captain Boomerang (Nick E.