Legends of Yesterday title card "Things were looking a little grim, but part of me was, admittedly, a little excited for a "reunion" of old friends."

Cisco Ramon[src]

This episode is part of a larger crossover series, Heroes Join Forces.

"Run, Barry. Run."
Oliver Queen encouraging Barry Allen to save himself and escape from Vandal Savage.
"Legends of Yesterday" is the eighth episode of the fourth season of Arrow, and the seventy-seventh episode overall. It aired on December 2, 2015. The episode is the second part of the two-part crossover, Heroes Join Forces, with the eighth episode of the second season of The Flash. It serves to set up the upcoming series, DC's Legends of Tomorrow.


Oliver and Barry Allen take Kendra Saunders and Carter Hall to a remote location to keep them hidden from Vandal Savage while they figure out how to defeat him. Malcolm arranges a meeting between Vandal, Green Arrow and The Flash that doesn't go as planned. Meanwhile, Felicity, Thea, Diggle and Laurel work with Team Flash to come up with a weapon powerful enough to destroy Vandal Savage.[1]


Preparation ran from September 22 until September 30, 2015. Shooting ran from October 1 until October 15, 2015.[2]


  • This episode marks the shortest appearance of Star City on Arrow, as the city only appeared during the final scene. Most of the episode takes place in Central City.
  • This is one of the only episodes of Arrow before Season 6 that doesn't feature the flashback storyline at all.
  • Despite this being an Arrow episode, The Flash lightning transition graphic is still used during the episode.
  • The title of this episode likely refers to the fact that Barry traveled back in time to the previous day after Vandal Savage destroyed Central City by unleashing a devastating energy blast from the Staff of Horus.
  • Barry running from Vandal Savage's blast that destroys Central City is a reference to a scene from Justice League: The Flashpoint Paradox where Barry runs from a similar blast in the movie created by Aquaman's Captain Atom-powered bomb.
  • This episode is included in The Flash Season 2 home release.
  • Thea mentions seeing a movie with "a bunch of superheroes in a farmhouse", probably referencing Avengers: Age of Ultron, where the heroes hid in Hawkeye's farmhouse.


Promotional images



  1. Arrow #4.8 Description: “Legends of Yesterday” (Flash Crossover Part 2) - GreenArrowTV
  2. Marc Guggenheim (@mguggenheim) - Twitter

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