what episode of dc legends of tomorrow is invasion
Season 2, Episode 7
title: Legends of Tomorrow text: second season of "The Flash" and the fourth season of "Arrow". In November 2016, the cast of "Legends of Tomorrow" appeared on "The Flash" and "Arrow" as part of the three-part "Invasion!" crossover event; the crossover episodes also featured appearances by Melissa Benoist, reprising her role as Kara Danvers / Supergirl from the TV series "Supergirl". Legends of Tomorrow DC's Legends of Tomorrow, or simply Legends of Tomorrow, is an American superhero television series developed by Greg Berlanti, Marc Guggenheim, Andrew Kreisberg, and Phil Klemmer, who are also executive producers along with Sarah Schechter and Chris Fedak; Klemmer and Fedak title: Heroes Join Forces text: Heroes Join Forces "Heroes Join Forces" is the second annual Arrowverse crossover event, featuring episodes of the television series "The Flash" and "Arrow" on The CW. The event began on December 1, 2015, with "The Flash" episode "Legends of Today" and concluded the following day with the "Arrow" episode "Legends of Yesterday". The episodes feature characters from "DC's Legends of Tomorrow", which was being developed as a spin-off. The crossover sees Barry Allen / Flash and Oliver Queen / Arrow team up to take on Vandal Savage, who is looking for Kendra Saunders and Carter Hall, the reincarnations of Hawkgirl title: Heroes Join Forces text: as one of the best television episodes of 2015. Heroes Join Forces "Heroes Join Forces" is the second annual Arrowverse crossover event, featuring episodes of the television series "The Flash" and "Arrow" on The CW. The event began on December 1, 2015, with "The Flash" episode "Legends of Today" and concluded the following day with the "Arrow" episode "Legends of Yesterday". The episodes feature characters from "DC's Legends of Tomorrow", which was being developed as a spin-off. The crossover sees Barry Allen / Flash and Oliver Queen / Arrow team up to take on Vandal Savage, who is looking for title: Invasion! (Arrowverse) text: Invasion! (Arrowverse) "Invasion!" is the third annual Arrowverse crossover event, with episodes of the television series "The Flash", "Arrow" and "Legends of Tomorrow" on The CW, and is inspired by the 1989 comic miniseries "Invasion!". Events at the end of the "Supergirl" episode "Medusa" on November 28, 2016 marked the beginning of the crossover, which began on November 29 with "The Flash", continued on "Arrow" on November 30, and concluded on "Legends of Tomorrow" on December 1. Each of the main three episodes were titled "Invasion!". In the crossover, Barry Allen recruits Kara Danvers / Supergirl from Earth-38 to Earth-1 title: Invasion! (Arrowverse) text: a three-night event entitled "Heroes United". A faux classified U.S. government video was released, set about 70 years in the past, detailing the Dominators' first attempt to conquer Earth. The crossover's trailer was released on November 23, 2016. The episodes, the rest of "Legends of Tomorrow"s second season, "The Flash"s third season and "Arrow"s fifth season were released separately on Blu-ray and DVD in Region 1 on August 15, 2017, September 5 and September 19, respectively. The three episodes, accompanied by three "Allied: The Invasion Complex" behind-the-scenes featurettes (included separately in each series' home media release), were released together on