when does barney find out who the mystery girl is
Everything Must Go (How I Met Your Mother) Barney is plagued by the mysterious woman who has been informing his conquests of his true intentions, leading to a slap from whomever he is attempting to seduce. He is onto the saboteur and follows her from the bar and to a taxi. He discovers that it is Abby, Stella's secretary, who is in love with Ted and who had a one-night stand with Barney.
Doppelgangers (How I Met Your Mother) Although Marshall is ready to have a baby, Lily is not, so they reach a compromise: they make a pact to start trying to have a baby once they finally see Barney's doppelg채nger. One day they finally spot Barney's doppelg채nger, who appears in the form of a brown-haired cab driver, but later find out it is only Barney's tactic to pick up women from the UN headquarters and sleep with one woman from every country on the planet. Meanwhile, Ted decides to get his hair dyed blond, much to the amusement of the gang. Robin finally gets an offer for her dream job as lead anchor at rival station WNKW. However, she eventually decides to give it up as it requires her to move to Chicago and she wants to stay in New York City for the sake of her relationship with Don. Having nearly had to deal with Robin's departure, Barney realizes that the addition of a baby to the gang would not be that bad after all, and dresses up as an Estonian street performer in order to convince Lily that the fifth doppelg채nger has appeared. Lily and Marshall see through his act, but thank him for the gesture, assuring him that he will be a part of their family.