Alex returns home with a dark mission of revenge. Jack, Tom, and Kyra must enlist the help of unlikely allies to save Alex before he commits to Scorpia forever.

Cast: Otto Farrant, Stephen Dillane, Vicky McClure, Brenock O'Connor, Ronkẹ Adékoluẹjo, Marli Siu, Thomas Levin, Jason Wong, Sofia Helin, Kevin McNally