A crossover event that began on "The Flash" concludes with Oliver teaming with the Flash to stop a boomerang-wielding killer who plants five bombs in the city that are set to explode at the same time.
Quest roles:
Audrey Marie Anderson(Lyla Michaels), Danielle Panabaker(Caitlin Snow / Killer Frost), Grant Gustin(Barry Allen / The Flash), Carlos Valdes(Cisco Ramon), Cynthia Addai-Robinson(Amanda Waller), Nick E. Tarabay(Digger Harkness), Tommy Campbell(Lead Gunman), Adam Lolacher(Klaus Markos), Dan Rizzuto(A.R.G.U.S. Guard), Marcus Sim(Li Khuan Hui), Vincent Tong(Katsu Cheng), Richard Faraci(Biker Leader)