- Previous episode S01E20 - The Trap
- Number S01E21
- Director Dermott Downs
- Writers Grainne Godfree, Kai Yu Wu
Barry must deal with the Reverse Flash's latest threat to a member of the group. To make matter worse, Dr. Wells unleashes Grodd on the city in order to distract Barry and the team. Joe, Barry and Cisco head down into the sewers to catch Grodd but the gorilla quickly gets the upper hand after he kidnaps Joe. Iris and Barry have a heart to heart talk.