In the year 2030, Ted Mosby (voiced by Bob Saget) gathers his daughter and son to tell them the story of how he met their mother.
When Barney mysteriously leaves MacLaren's, the gang follow him to a house in Brooklyn, finding that Barney has a wife and child they never knew about. Barney explains that it is all a ruse to please his mother, (Guest Star Frances Conroy) whom they also meet, and that "Betty" and "Tyler" are actors. Betty and Ted are caught in a kiss, which finally forces Barney to confess to his mother. Marshall is upset when Lily admits she hates his mother.

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Part 1
Part 2