Bo was hearbrokendover the loss of Rainer. Dyson, who apparently doesn't have a jealous bone in his body, vowed to stand by her. The comrades entered the temple of the priestesses of Epona where the portal to Hel had opened and which they tried to close up. Given that Hel is all dark and evil, and Bo had Dark Fae tendencies, she momentarily goes all dark side but Dyson straightens her out. During all this, Massimo unintentionally killed his mom, The Morrigan.