For episodes of the same name, see Invasion!
"There's Flash and—and Supergirl and—and people with actual powers now. Whatever needs to be done, they can handle it. We—we finally have a chance to be happy. I mean, why—why can't you just for a second accept that maybe this is your reward for all of the sacrifices you have made?"
Thea Queen to Oliver Queen

"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.


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.[1]


  • 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 & Company.
  • This is the first episode of Season 5 that doesn't include the Flashback storyline.
  • The beginning of the episode, when Oliver is running, is a reference to the first scene of the very first episode of Arrow (and the Arrowverse), "Pilot" , a trend that continued at the start of every Arrow season's first episode except season 5.
  • This is the first appearance of Sara on Arrow since "Lost Souls", and the first appearance of Ray on Arrow since "Brotherhood".
  • This episode marks Deathstroke's first appearance since "The Return". However, he wasn't shown without his mask, as well as not saying a word, due to Manu Bennett not reprising the role.
    • However, Deathstroke can be seen without his mask in Thea's flashback from "Seeing Red".
  • 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.
  • Evelyn Sharp neither appears nor is even mentioned in this episode.
    • Marc Guggenheim explained in an interview that this was done on purpose, due to the previous episode's revelation that Artemis had joined Prometheus. Thus, the directors removed Artemis from this episode to prevent a distraction to the fans.[2]
  • This episode marks Susanna Thompson's first appearance as Moira Queen since Season 2's Seeing Red, 57 episodes ago, and Jamey Sheridan's first appearance as Robert Queen since Season 3's The Return, 40 episodes ago.
  • The bow Cisco used to track down Oliver is the bow Oliver used in the first season.
  • The Hozen Thea gave to Oliver as a gift is the same Hozen Oliver gave Thea after he returned from Lian Yu in the pilot.
  • This is the second episode in which Barry appears only as The Flash. The first one is "My Name Is Oliver Queen".
  • Curtis refers to his "3PO processor", before imitating C-3PO from the Star Wars franchise.
  • Ra's al Ghul and Prometheus are the only main antagonists of Arrow (from the Present storyline) that didn't appear in the dream world. However, Ra's al Ghul made a cameo in a flashback from "Left Behind (DC's Legends of Tomorrow)Left Behind.
  • Firestorm makes a cameo at Sara's flashback from the previous part of the crossover. This marks the first time since "Rogue Air" that Firestorm appears without Martin Stein/Jefferson Jackson/Ronnie Raymond.
  • 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.
  • Ray jokingly suggests they "click our heels three times and say there's no place like home." to escape the Dominators' mother ship, a reference to Wizard of Oz.
  • The Wizard of Oz had been shown/referanced in all of DC's shows. DC's Legends of Tomorrow in Turncoat and Aruba. In The Flash's crossover with Supergirl in Duet, the show Supergirl in Triggers aswell as in Arrow's Invasion.
  • As the 100th episode of Arrow, this episode including clips from different episodes through the series.
  • The Bartender "Joe" who gives drinks to Laurel and Sara is played by the real-life father of Caity Lotz.
  • 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, much to Colin Donnell's surprise.[3]
    • 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.[4]
  • Felicity and Ray are revealed to be engaged in the dream world, just as they were together in the third season.
  • As the heroes fight the villains in the dream world, there are throwbacks to earlier in the series, or characters gain some form of closure.
  • This episode title card goes through several arrowhead designs from past seasons, from the first to the newest, as a reference to being an anniversary episode.
  • After being rescued by the Waverider, Thea states, "this is exactly twice as many spaceships as I ever thought I'd be on!" Even though she referenced being on zero, she was on two spaceships, which is infinitely many more times than she imagined.
  • Oliver waking up in a world where he isn't Green Arrow is similar to episodes of Supergirl, The Flash, & Batman: The Animated Series
    • In the Supergirl episode, For the Girl Who Has Everything, Black Mercy causes Kara to wake up in a dream world where Krypton never blew up, and she never came to Earth and became Supergirl. Diggle even brings to Oliver's attention that he has "everything" in the dream world. Whether this is a nod to the Supergirl episode is unknown.
    • In The Flash episode, "Flashpoint", Barry lives in an alternate timeline he created where he stopped The Reverse Flash from killing his mother, and despite having his speed, doesn't need to be The Flash
    • In the Batman: The Animated Series episode "Perchance To Dream" where Bruce Wayne wakes up in a world where he is not Batman.
  • Erica Luttrell is no stranger to her involvement with various DC Comics adaptions. She previously voiced Cheetah and Martha Keny in the animated film JLA Adventures: Trapped in Time. In addition to voicing a young Dr. Fate in Justice League Action, Luttrell reprised her role as Cheetah in the video games LEGO Batman 3: Beyond Gotham and Injustice 2.



Preparation ran from September 14 until September 22, 2016. Shooting ran from September 23 until October 7, 2016.[5]


  1. Arrow Episode 100 “Invasion!” Description: Katie Cassidy’s Role Confirmed - GreenArrowTV
  3. Colin Donnell (@colindonnell) - Twitter
  4. Colin Donnell (@colindonnell) - Twitter
  5. Marc Guggenheim (@mguggenheim) - Twitter