The Flash — “Potential Energy” — Image FLA210a_9546b — Pictured: Jesse L. Martin as Detective Joe West — Photo: Jack Rowand/The CW — © 2016 The CW Network, LLC. All rights reserved.

The Flash — “Potential Energy” — Image FLA210a_0363b — Pictured (L-R): Jesse L. Martin as Detective Joe West and Keiynan Lonsdale as Wally West — Photo: Jack Rowand/The CW — © 2016 The CW Network, LLC. All rights reserved.

The Flash — “Potential Energy” — Image FLA210a_9530b — Pictured: Keiynan Lonsdale as Wally West — Photo: Jack Rowand/The CW — © 2016 The CW Network, LLC. All rights reserved.

The Flash — “Potential Energy” — Image FLA210a_9625b — Pictured: Keiynan Lonsdale as Wally West — Photo: Jack Rowand/The CW — © 2016 The CW Network, LLC. All rights reserved.

The Flash — “Potential Energy” — Image FLA210a_9517b — Pictured: Keiynan Lonsdale as Wally West — Photo: Jack Rowand/The CW — © 2016 The CW Network, LLC. All rights reserved.

The Flash — “Potential Energy” — Image FLA210a_0286b — Pictured: Jesse L. Martin as Detective Joe West — Photo: Jack Rowand/The CW — © 2016 The CW Network, LLC. All rights reserved.

The Flash — “Potential Energy” — Image FLA210b_0134b — Pictured: Grant Gustin as Barry Allen — Photo: Katie Yu/The CW — © 2016 The CW Network, LLC. All rights reserved.

The Flash — “Potential Energy” — Image FLA210b_0004b — Pictured (L-R): Danielle Panabaker as Caitlin Snow and Teddy Sears as Jay Garrick — Photo: Katie Yu/The CW — © 2016 The CW Network, LLC. All rights reserved.

The Flash — “Potential Energy” — Image FLA210b_0035b — Pictured: Grant Gustin as Barry Allen — Photo: Katie Yu/The CW — © 2016 The CW Network, LLC. All rights reserved.

The Flash — “Potential Energy” — Image FLA210b_0078b — Pictured (L-R): Shantel Van Santen as Detective Patty Spivot and Grant Gustin as Barry Allen — Photo: Katie Yu/The CW — © 2016 The CW Network, LLC. All rights reserved.

The Flash — “Potential Energy” — Image FLA210b_0096b — Pictured (L-R): Shantel Van Santen as Detective Patty Spivot and Grant Gustin as Barry Allen — Photo: Katie Yu/The CW — © 2016 The CW Network, LLC. All rights reserved.

The Flash — “Potential Energy” — Image FLA210b_0129b — Pictured (L-R): Danielle Panabaker as Caitlin Snow and Teddy Sears as Jay Garrick — Photo: Katie Yu/The CW — © 2016 The CW Network, LLC. All rights reserved.

The Flash — “Potential Energy” — Image FLA210b_0069b — Pictured: Shantel Van Santen as Detective Patty Spivot — Photo: Katie Yu/The CW — © 2016 The CW Network, LLC. All rights reserved.

The Flash — “Potential Energy” — Image FLA210b_0107b — Pictured: Shantel Van Santen as Detective Patty Spivot — Photo: Katie Yu/The CW — © 2016 The CW Network, LLC. All rights reserved.

The Flash — “Potential Energy” — Image FLA210b_0205b — Pictured: Grant Gustin as The Flash — Photo: Katie Yu/The CW — © 2016 The CW Network, LLC. All rights reserved.

Official Synopsis:

“Potential Energy” — (8:00-9:00 p.m. ET) (TV-14, LV) (HDTV)

JOE AND IRIS GET TO KNOW WALLY — Now that they’ve grown closer, Barry (Grant Gustin) considers telling Patty (guest star Shantel VanSanten) that he is The Flash. Meanwhile, Joe (Jesse L. Martin) and Iris (Candice Patton) try to get to know Wally (Keiynan Lonsdale), and the team hunts down a meta-human who can slow time itself. Rob Hardy directed the episode written by Bryan Q. Miller. (#210).  Original airdate 01/19/2016.