Air Date : 2014-12-03
Season Number : 3
Storyline : 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.
Casts : Stephen Amell, Katie Cassidy, Colton Haynes, David Ramsey, Paul Blackthorne, Willa Holland