After conquistadors lay siege to her tribe, a young Mohawk woman ventures into the Tesseract-powered waters of the legendary Forbidden Lake to recruit the forces of Sky World to help save her people.

Dary gets in with a bad crowd.

Doctors Gamelli, Svensson and Lasbrey blow the whistle on Macchiarini but face the consequences. In Russia, Paolo convinces Yulia to go through with the surgery. Benita struggles to tell her story.

The Slow Horses fight for their lives. Lamb shares some devastating truths with Catherine.

Tae-sang steadfastly remains to save Chae-ok and the captives. On a mission to find her mother, Chae-ok learns the grisly truth - and confronts the beast.

Having crash-landed on a desert island, Lori and the other passengers fight to stay alive as peril lurks at every corner. As her search for the pilot leads her back to Fiji, Erin forms an unlikely allegiance with his daughter.