"Doppelgangers" is a great episode, but disappointing series finale. I love the idea of Lily and Marshall trying to have a baby once they find the last doppelganger. I love how they finally see Barney's doppelganger. The only thing I didn't like was how confusing this episode was. That's the problem with season 5, they make some episodes too confusing where characters can't make up their mind about something, and it just becomes annoying. I'm just happy that Lily and Marshall decide to have a baby at the end of this episode. Don's a jerk for taking the job Robin was offer. I give this episode a 7/10.