Operation X

Operation X is the seventh episode of the first season of NBC's Justice League. It first aired on November 13, 2018. It is the seventh episode overall.

Synopsis
The Justice League learn from Agent Spencer that the D.E.O. has captured the Legion of Doom and created battle clones to test the Justice League. However, the League realize that the past two months could have all been a simulation.

Starring

 * Ben Affleck as Bruce Wayne/Batman
 * Joseph Gordon-Levitt as Tim Drake/Red Robin
 * Emma Stone as Stephanie Brown/Spoiler
 * Yvonne Strahovski as Kate Kane/Batwoman
 * Jeremy Jordan as Winslow Schott/Toyman
 * Tyler Hoechlin as Clark Kent/Superman
 * Sarah Hyland as Barbara Gordon/Batgirl
 * Todd Stashwick as Roman Sionis/Black Mask
 * Alexander Gould as Dick Grayson/Nightwing
 * Wentworth Miller as Leonard Snart/Captain Cold
 * John Barrowman as Arthur King/Merlyn
 * Tom Ellis as Sebastian Ballesteros/Cheetah
 * Gal Gadot as Diana Prince/Wonder Woman
 * Jesse Eisenberg as Lex Luthor
 * Katie Cassidy as Dinah Lance/Black Canary
 * Grant Gustin as Barry Allen/the Flash
 * Melissa Benoist as Kara Danvers/Supergirl
 * Chris Wood as Mike Matthews/Mon-El

Guest Starring

 * Natalie Martinez as Agent Kate Spencer

Trivia

 * This episode achieved 13.77 million U.S. live viewers.
 * Jesse Eisenberg and Katie Cassidy do not appear in this episode as Lex Luthor and Dinah Lance.
 * This episode received critical acclaim. It scored 91% on Rotten Tomatoes, a 91 out of 100 on Metacritic, and 9.3/10 on IGN.
 * Guest stars in this episode include Natalie Martinez as Kate Spencer.
 * This episode is rated TV-14 for D-L-S-V.