Legends of Yesterday

"Run, Barry. Run."

—Oliver Queen encouraging Barry Allen to go back in time in order to save themselves from Vandal Savage.

"Legends of Yesterday"
Information
Episode number	77 of 170
Original airdate	December 2, 2015
Written by	Story by: Greg Berlanti Marc Guggenheim Teleplay by: Brian Ford Sullivan Marc Guggenheim
Directed by	Thor Freudenthal
Guest stars
Grant Gustin as Barry Allen/The Flash (special guest star) Danielle Panabaker as Caitlin Snow (special guest star) Carlos Valdes as Cisco Ramon (special guest star) Ciara Renée as Kendra Saunders/Hawkgirl/Chay-Ara (special guest star) Casper Crump as Vandal Savage Falk Hentschel as Carter Hall/Khufu Anna Hopkins as Samantha Clayton Peter Francis James as Aldus Boardman
Chronology
Preceded by	"Brotherhood" "Legends of Today" (The Flash)
Followed by	"Dark Waters"

"Legends of Yesterday" is the ???th episode of Arrow. It aired on December 2, 2015. "Legends of Yesterday" is the eighth episode of the fourth season of Arrow and the seventy-seventh episode overall. The episode is the second of a two-part crossover with the eighth episode of the second season of The Flash. It serves to set up the upcoming series, DC's Legends of Tomorrow.

Synopsis

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.

Production

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

Trivia

• 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 instead.
• This is one of the only episodes of Arrow 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 the Flash time travelled back to the previous day after Vandal Savage destroyed Central City by unleashing a devastating energy blast from the Staff of Horus.

Gallery

Promotional images

Promos

The Flash & Arrow - "Heroes Join Forces" Two Hour Event Promo (HD)

The Flash & Arrow "Heroes Join Forces" Crossover Event - Extended Trailer (HD)

Arrow 4x08 New Zealand Promo