As Arrow fans know, Laurel Lance died at the hands of Damien Darhk toward the end of Season 4. The show has since brought the actress back for a hallucination sequence during the 100th episode, which aired in November during the annual crossover event, and in last month’s midseason premiere. The last time we saw Katie Cassidy on the show, she was actually playing the evil Earth-2 doppleganger of the woman we all knew and loved as Black Canary, the villain Black Siren, who was working for Season 5 Big Bad, Prometheus. Team Arrow defeated her and had her imprisoned in an A.R.G.U.S. facility, so it’s incredibly likely that, should we see Cassidy again, she’ll be back on board as Black Siren.