Season 3 kicks off with Jonah’s alien family inhabiting three PRIDE members, but their menacing son is missing, hiding in a Runaway. While the kids and Xavin try to find the traitor, Leslie’s unborn child becomes his target, which leads Xavin to her true destiny. Nico’s visions of Morgan le Fay, a witch with cruel ambitions, become a reality and force her and the others into a dark world. Morgan uses magic and Wizard’s technology to regain a long-lost power. The Runaways and PRIDE must stop her or face the consequences, together.