Tatyana Forrest

Equipped with the tachyon device, Barry believes he is fast enough to stop Zoom (guest star Teddy Sears) and wants to open the breaches to catch him. Harry strongly advises against that plan but after Barry convinces him, Harry reveals that Cisco has the power to re-open the breach. Meanwhile, Hunter Zolomon's (Teddy Sears) painful story on Earth-2 is revealed.

Kennex and Dorian investigate a crime scene involving a self-guided bullet that can track, target and kill specific people at any moment. Meanwhile, Maldonado revisits the deadly ambush that almost killed Kennex.

The S.C.U. investigates when a young female sex surrogate is found dead; Backstrom receives upsetting news about his mother.