Caitlin, Barry and Cisco learn something new about Caitlin’s father. Meanwhile, Iris and Sherloque follow a clue about Cicada.

Oliver and Diggle face their biggest challenge yet. Curtis is disappointed to find out his new boyfriend has a firm anti-vigilante stance.

When a young woman meets a violent death after partying at Verdant, Detective Lance and his new partner, Detective Hilton inform Oliver and Tommy that she was on the drug…