During the S.T.A.R. Labs incident, CCPD undercover officer Tina Boland develops a sonic scream after watching her partner die at the hands of drug dealer Sean Sonus. In the present day,

Oliver welcomes the seemingly-revived Laurel into the team; but it becomes clear that she is Laurel’s Earth-2 doppelganger, having been broken out of S.T.A.R. Labs by Prometheus. Laurel escapes and calls Oliver for an arrangement, ending in her capture. Learning about Paul, Rene convinces Curtis...