A New World (The Flash)

"A New World" is the series finale of the American superhero television series The Flash. The series is set in the Arrowverse, sharing continuity with the other television series of the universe, and is a spin-off of Arrow. Spanning the tenth to thirteenth episodes of the ninth season, the episodes were the 181st through 184th overall. The episodes began airing on May 3, 2023, and concluded on May 24; the Arrowverse as a whole also concluded with these episodes. The series centers on Barry Allen / The Flash, a crime-scene investigator who gains superhuman speed which he uses to fight criminals, including others who also have superhuman abilities.

Grant Gustin stars as the eponymous character, alongside principal cast members Candice Patton, Danielle Panabaker, Danielle Nicolet, Kayla Compton, Brandon McKnight, and Jon Cor. Former series regulars including Tom Cavanagh, Jesse L. Martin, Rick Cosnett, and Jessica Parker Kennedy return for guest appearances. The four-episode arc sees Barry taken throughout time as he attempts to defeat the Negative Speed Force, eventually facing down a resurrected Eddie Thawne (Cosnett), who becomes the speedster Cobalt Blue.

The first and fourth parts of "A New World" were co-written by showrunner Eric Wallace with Thomas Pound and Sam Chalsen respectively. Part two was written by Kristen Kim and Lauren Fields; part three was directed by Jonathan Butler and Sarah Tarkoff. Wallace additionally served as director for part one. Compton, Stefan Pleszczynski, and Vanessa Parise directed parts two through four respectively. Averaging about 430,000 viewers per episode, "A New World" received mixed reviews from critics.