"When I first saw him, all I could see was Eobard Thawne. But when I saw him, when I really saw Harry for who he was, I became his friend, and he became mine. Yeah you got off to a bad start with Allegra, but it's not too late to build something good."
Cisco comparing his relationship with Harry to Nash with Allegra.
"The Exorcism of Nash Wells" is the fifteenth episode of the sixth season of The Flash, and the one-hundred-twenty-ninth episode overall. It aired on March 17, 2020.


The Flash takes on a dangerous new meta named Sunshine. Cisco sets out to help Nash.[src]



Guest starring



  • This episode features the storyline of a villainous speedster, Eobard Thawne, being reduced to energy that lives on by possessing an ally of The Flash, Nash Wells. This is exactly what Jay Garrick’s Reverse Flash, Edward Clariss/The Rival, did in the comics, only he possessed the body of zen speedster Max Mercury.
  • Cisco quips that Thawne has "Linda Blair'd" Nash, referencing the actor's role as the possessed child Regan MacNeil in The Exorcist films.
  • This is the first episode of The Flash where Iris doesn't appear. However, Candice Patton still plays the Mirrorverse counterpart of the character.
  • Cisco relates multiple psyches in a single brain as "Tyler Durden times 1000", referencing the split personality of the protagonist of Fight Club and its film adaptation. Nash overhears and goes to quote Fight Club, but is cut off.
  • Cisco likens Thawne's formlessness to Voldemort from the Harry Potter franchise.
  • Sunshine killing the police officers except Joe West and David Singh is quite similar to what Zoom did in the season 2 episode "Rupture", in which he killed all of the police officers and a news cameraman except for Joe and Singh at CC Jitters for the sake of his affections for Caitlin Snow.
  • Sunshine mentions that Black Hole is aware of Frost surviving Dr. Light's attack, which occurred in "Marathon".
  • Thawne disappearing out of Nash's mind is quite similar to other instances where he's been erased from existence, in which during each he disappeared in different colors of light. Firstly in "Fast Enough" he disappeared into blue light, and then later in the DC's Legends of Tomorrow episode "Aruba" he vanished into orange light; this is different to this episode, where he disappeared into red negative tachyons.
  • Due to Danielle Panabaker's pregnancy during the shooting of this episode, all scenes were shot above her waistline and the most scenes of Frost fighting were done by a stunt double.


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