Invasion! (DC's Legends of Tomorrow)


 * For episodes of the same name, see Invasion!.

"Invasion!" is the seventh episode of the second season of DC's Legends of Tomorrow, and the twenty-third episode overall. The episode is the fourth of a four-part crossover with the eight episode of the season two of Supergirl, eighth episode of the third season of The Flash and eight episode of the fifth season of Arrow. It will air on December 1, 2016.

Synopsis
After learning the Dominators' plan for the world, the Legends must work together with The Flash, Supergirl and Green Arrow to kill them once and for all. Meanwhile, Stein figures out, with the help of others, how the team can terminate the Dominators, but is distracted by the aberration he realizes he created in 1987.

Production
Preparation ran from September 16 until September 26, 2016. Shooting ran from September 27 until October 12, 2016, with a break for Canadian Thanksgiving on October 10.