Leviathan

"Leviathan" is the upcoming thirteenth episode of the first season of DC's Legends of Tomorrow, and the thirteenth episode overall. It will air on April 28, 2016.

Synopsis
Rip takes the team to London in the year 2166, three months before his family is killed. He believes this to be their final opportunity to take out Savage who is, unfortunately, at the height of his power. However, the team discovers two key elements to defeating him – Savage's daughter and the means to kill Savage once and for all.

Production
Preparation ran from February 4 until February 15, 2016. Shooting began on February 16 and ran until February 26, 2016.