But do note that it is not possible to be certain of a person's genealogy without a family's cooperation (and/or DNA testing).
Rachel Bilson is currently dating Hayden Christensen.
I've been unsure about the Mother this entire season, but this episode depleted all doubts about her.
She's beautiful and hilarious and so down-to-earth.
In the continuing story Ted is telling his children in 2030 of how he met their mother, he flips the story to tell them of what their mother was doing while Ted was hanging out with Marshall, Lily, Robin and Barney over those same years.