The Flash — “Who is Harrison Wells?” — Image FLA119A_0266b — Pictured (L-R): Jesse L. Martin as Detective Joe West, Grant Gustin as Barry Allen, Danielle Panabaker as Caitlin Snow, and Carlos Valdes as Cisco Ramon — Photo: Katie Yu /The CW — © 2015 The CW Network, LLC. All rights reserved.

http://www.youtube.com/watch?v=fcz-yuN3kSw

Episode Description:

JOE AND CISCO TRAVEL TO STARLING CITY FOR ANSWERS ABOUT DR. WELLS — Joe (Jesse L. Martin) and Cisco (Carlos Valdes) head to Starling City to continue their investigation of Dr. Wells (Tom Cavanagh). While in town, the duo enlists the help of Captain Lance (guest star Paul Blackthorne), and Cisco meets the Black Canary (guest star Katie Cassidy), who asks him for a favor. Meanwhile, back in Central City, Barry (Grant Gustin) races to catch a meta-human named Hannibal Bates (guest star Martin Novotny) who can transform himself into every person he touches – which includes Eddie (Rick Cosnett), Iris (Candice Patton), Caitlin (Danielle Panabaker) and even The Flash. Wendey Stanzler directed the episode written by Ray Utarnachitt & Cortney Norris (#119). Original airdate 4/21/2015.