The Flash — “Grodd Lives” — Image FLA121B_0235b — Pictured (L-R): Tom Cavanagh as Harrison Wells and Rick Cosnett as Detective Eddie Thawne — Photo: Cate Cameron/The CW — © 2015 The CW Network, LLC. All rights reserved.

The Flash — “Grodd Lives” — Image FLA121B_0081b — Pictured (L-R): Rick Cosnett as Detective Eddie Thawne and Tom Cavanagh as Harrison Wells — Photo: Cate Cameron/The CW — © 2015 The CW Network, LLC. All rights reserved.

The Flash — “Grodd Lives” — Image FLA121B_0120b — Pictured (L-R): Rick Cosnett as Detective Eddie Thawne and Tom Cavanagh as Harrison Wells — Photo: Cate Cameron/The CW — © 2015 The CW Network, LLC. All rights reserved.

The Flash — “Grodd Lives” — Image FLA121B_0130bc — Pictured (L-R): Rick Cosnett as Detective Eddie Thawne and Tom Cavanagh as Harrison Wells — Photo: Cate Cameron/The CW — © 2015 The CW Network, LLC. All rights reserved.

The Flash — “Grodd Lives” — Image FLA121B_0131b — Pictured: Rick Cosnett as Detective Eddie Thawne — Photo: Cate Cameron/The CW — © 2015 The CW Network, LLC. All rights reserved.

The Flash — “Grodd Lives” — Image FLA121B_0148b — Pictured: Tom Cavanagh as Harrison Wells — Photo: Cate Cameron/The CW — © 2015 The CW Network, LLC. All rights reserved.

The Flash — “Grodd Lives” — Image FLA121B_0151b — Pictured: Rick Cosnett as Detective Eddie Thawne — Photo: Cate Cameron/The CW — © 2015 The CW Network, LLC. All rights reserved.

The Flash — “Grodd Lives” — Image FLA121A_0049b2 — Pictured: Blank — Photo: Cate Cameron/The CW — © 2015 The CW Network, LLC. All rights reserved.

The Flash — “Grodd Lives” — Image FLA121SG_033.090.007 — Pictured (L-R): Grodd and Jesse L. Martin as Detective Joe West — Photo: The CW — © 2015 The CW Network, LLC. All rights reserved.

The Flash — “Grodd Lives” — Image FLA121_SG_049.020.001 — Pictured (L-R): Grodd and Grant Gustin as Barry Allen / The Flash — Photo: The CW — © 2015 The CW Network, LLC. All rights reserved.

Episode Description:

GRODD RETURNS! — Barry (Grant Gustin) must deal with the Reverse Flash’s (Tom Cavanagh) 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 (Jesse L. Martin), Barry and Cisco (Carlos Valdes) head down into the sewers to catch Grodd but the gorilla quickly gets the upper hand after he kidnaps Joe. Iris (Candice Patton) and Barry have a heart to heart talk. Dermott Downs directed the episode written by Grainne Godfree & Kai Yu Wu (#121). Original airdate 5/5/2015.