Invasion! (Arrow)


 * For episodes of the same name, see Invasion!

"Invasion!" is the eighth episode of the fifth season of Arrow, and the one-hundredth episode overall. The episode is the third of a four-part crossover with the eight episode of the second season of Supergirl, eighth episode of the third season of The Flash and seventh episode of the second season of DC's Legends of Tomorrow. It aired on November 30, 2016.

Synopsis
Oliver wakes up to a life where he never got on The Queen's Gambit. Robert and Moira are alive and well. Laurel is his loving fiancée and their wedding is imminent. Everything seems perfect, but Oliver starts to notice small imperfections that make him question this new reality. Meanwhile, Felicity and the recruits take on a new threat with help from The Flash and Supergirl.

Trivia

 * When mentioning how they have to find "Oliver and company", Cisco makes it clear that he is not referring to the 1988 Disney film Oliver &amp; Company.
 * Cisco refers to the stasis that the heroes are being kept in as "a little alien, a little Star Trek - J. J. Abrams style", referring to the 2009 film, Star Trek, and its 2013 sequel Star Trek Into Darkness, both of which were directed by J. J. Abrams.
 * Curtis refers to his "3PO processor", before imitating C-3PO from the Star Wars franchise.
 * Curtis claims to feel like "Elliott from E.T.", exclaiming "It's working, it's working!", quoting the protagonist from the 1982 film, E.T. the Extra-Terrestrial.
 * In the dream world, Tommy was stated to be a doctor in Chicago. This is a reference to Colin Donnell's role in Chicago Med where he plays the role of a doctor. Furthermore, this was the reason that he could not return for a full appearance. However his image was digitally inserted during the scene where Oliver returns to the real world.
 * Donnell posted on Twitter stating that although he did not appear, he had seen the episode weeks ago, and praised the scene between Oliver and Thea, and gave kudos to his Chicago Med reference.
 * The illusionary Damien Darhk was "killed" by Sara Lance in the same manner that the real Darhk killed Laurel Lance, by thrusting an arrow to the stomach.
 * This episode marks the second time Nate has met and spoke with Oliver Queen (albeit the first time was on DC's Legends of Tomorrow).

Production
Preparation ran from September 14 until September 22, 2016. Shooting ran from September 23 until October 7, 2016.