'Ringer' recap: Buffy Versus Castiel
However Many Years Ago: Siobhan has a relationship with Dylan (Misha Collins, Supernatural's Castiel). When she turns up pregnant, he turns out to be a deadbeat. Shiv gives birth to Sean. A couple of years later, Dylan decides he wants back in his son's life. Shiv is not the forgive-and-forget type, and probably had Dylan beaten up and run out of Tahoe at some point. (How far is Tahoe from Why-oh-Why Wyoming and Macawi's minions?) Still, Dylan persists in trying to be a father.
Bridget babysits Sean during the day, while Shiv works at a mystery job. Being Nice Buffy, when Dylan shows up with ticket to a big fair, Bridget agrees to let Sean go (she accompanies them), even though she knows Shiv would be displeased. On their way home from the fair, a car appears out of nowhere and crashes into Dylan's car. Sean is killed. When a sling-adorned Bridget shows up at Sean's funeral, Shiv severs their relationship.