Dr Wells receives a blast from the past when a former protege returns to town with a taste for revenge.

Romance bubbles between Barry and a sports reporter, before a run-in with a metahuman who has teleportation powers.

Having discovered Zoom's true identity, Barry is more determined than ever to stop his arch-enemy.

Rollins goes undercover to find a suspect who is drugging and assaulting tourists, while Benson helps the victims sort out their memories from their hallucinations.

Barry turns to Hartley Rathaway for help when Godspeed returns unexpectedly; Iris tries to escape the Mirrorverse; after Barry realises one of the changes from Crisis is that The Flash and Pied Piper are now enemies, things get tense.

Barry feels guilty about what happened to Caitlin, Mark comes up with a plan that makes everyone sceptical, Red Death looms in Central City and commands that failure is not an option, and old friends pay an unexpected visit to STAR Labs.

Barry and Iris start to put together the pieces of what is happening in Central City and believe they know what the Rogues are after, the team recruits some unlikely allies to help, and Allegra tries to avoid having a conversation with Chester.

April blows off work to spend time with members of her support group. A school trip to Miami offers Brenna the opportunity to meet Natalie.

April's resolve to battle her situation wanes as her chemotherapy treatments begin to take a toll. Dominic returns to find that April has changed.

April learns about fertility options prior to starting chemotherapy, and seeks advice from her support group about breaking the news. George tries to help Sara cope.

With the start of her treatment looming, April finds herself with Leo on an eye-opening joyride. Brenna's uncertain relationship with Kiernan causes tension with Greer.