Kiyomi - S1.E22

While strolling along on the beach, discussing their future, Rafe, Sara and Goodwin discover the teenaged Kiyomi lying on the sand. She has no memory of anything that happened to her since her disappearance 3 centuries ago. Meanwhile, Mallos and a resurrected Vashista are lurking nearby. Apparently Mallos' Millennia Plan require that he marry the Immortal's daughter. Vashista raised the girl in the Beyond, and still has motherly feelings toward her. She tries to come to an arrangement with Rafe: he kills Mallos and she gets Kiyomi. Kiyomi is eventually lured to the abandoned building where the wedding is to take place, and Rafe is captured. Sara and Goodwin sneak in, and Vashista ultimately turns over a wedding-gowned dummy to Mallos and frees Raphael. In a final battle, Rafe sends Mallos back to Hell and recovers his daughter. However, as the episode ends, Vashista shows up and warns that the arrangement is only temporary.