Watch The Flash Season 1 Episode 19 - Who Is Harrison Wells?
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The FlashAir date: April 21, 2015
Episode Guide
| Season 01 | ||
| Episode 1 | City of Heroes | October 07, 2014 |
| Episode 2 | Fastest Man Alive | October 14, 2014 |
| Episode 3 | Things You Can't Outrun | October 21, 2014 |
| Episode 4 | Going Rogue | October 28, 2014 |
| Episode 5 | Plastique | November 11, 2014 |
| Episode 6 | The Flash Is Born | November 18, 2014 |
| Episode 7 | Power Outage | November 25, 2014 |
| Episode 8 | Flash vs. Arrow (1) | December 02, 2014 |
| Episode 9 | The Man in the Yellow Suit | December 09, 2014 |
| Episode 10 | Revenge of the Rogues | January 20, 2015 |
| Episode 11 | The Sound and the Fury | January 27, 2015 |
| Episode 12 | Crazy for You | February 03, 2015 |
| Episode 13 | The Nuclear Man | February 10, 2015 |
| Episode 14 | Fallout | February 17, 2015 |
| Episode 15 | Out of Time | March 17, 2015 |
| Episode 16 | Rogue Time | March 24, 2015 |
| Episode 17 | Tricksters | March 31, 2015 |
| Episode 18 | All-Star Team Up | April 14, 2015 |
| Episode 19 | Who Is Harrison Wells? | April 21, 2015 |
| Episode 20 | The Trap | April 28, 2015 |
| Episode 21 | Grodd Lives | May 05, 2015 |
| Episode 22 | Rogue Air | May 12, 2015 |
| Episode 23 | Fast Enough | May 19, 2015 |
| Season 03 | ||
| Episode 1 | Flashpoint | October 04, 2016 |
| Episode 2 | Paradox | October 11, 2016 |
| Episode 3 | Magenta | October 18, 2016 |
| Episode 4 | The New Rogues | October 25, 2016 |
| Episode 5 | Monster | November 01, 2016 |
| Episode 6 | Shade | November 15, 2016 |
| Episode 7 | Killer Frost | November 22, 2016 |
| Episode 8 | Invasion! (2) | November 29, 2016 |
| Episode 9 | The Present | December 06, 2016 |
| Episode 10 | Borrowing Problems from the Future | January 24, 2017 |
| Episode 11 | Dead or Alive | January 31, 2017 |
| Episode 12 | Untouchable | February 07, 2017 |
| Episode 13 | Attack on Gorilla City (1) | February 21, 2017 |
| Episode 14 | Attack on Central City (2) | February 28, 2017 |
| Episode 15 | The Wrath of Savitar | March 07, 2017 |
| Episode 16 | Into the Speed Force | March 14, 2017 |
| Episode 17 | Duet (2) | March 21, 2017 |
| Episode 18 | Abra Kadabra | March 28, 2017 |
| Episode 19 | The Once and Future Flash | April 25, 2017 |
| Episode 20 | I Know Who You Are | May 02, 2017 |
| Episode 21 | Cause and Effect | May 09, 2017 |
| Episode 22 | Infantino Street | May 16, 2017 |
| Episode 23 | Finish Line | May 23, 2017 |