The CW has released an official description for the April 15 episode of Arrow.
The episode is called “Broken Arrow” and here is how they describe it:
DOUG JONES GUEST STARS AS DC COMICS’ VILLAIN DEATHBOLT — Lance (Paul Blackthorne) continues his mission to take down the Arrow (Stephen Amell) so Felicity (Emily Bett Rickards) orders Oliver to keep a low profile. However, when a meta-human named Jake Simmons (guest star Doug Jones), who kills people with blasts of energy and plasma, starts terrorizing Starling City, Oliver is forced to ask Ray (Brandon Routh) for help. The unlikely duo is forced to team up to save the city. Doug Aarniokoski directed the episode with story by Jake Coburn and teleplay by Ben Sokolowski & Brian Ford Sullivan (#319). Original airdate 4/15/2015.