Factual error: In the final scene with Peter and Olivia in Walter's campus housing, Peter uncovers items that should have been in the house for years and they are dusty. The last thing he uncovers is a brand new flat screen HDTV with stickers on it, which would not have existed 17 years prior to then, when he was committed to St Clarie's Institution. (00:42:10)
Continuity mistake: Charlie, Olivia's former partner and friend in the FBI shows up in this episode during the interview with Mrs. Rusk, but Charlie was killed off by one of the shapeshifters in a previous episode, and the shapeshifter that killed Charlie was himself killed off by Olivia, who in other episodes reflected back on killing him. This episode was supposedly meant to be in season 1 as ep 21 or 22. Unknown why they didn't air it then, and decided to put it in the middle of season 2 (for no apparent reason).
Phillip Broyles: Someone out there is experimenting, only the whole world is their lab.
Question: In the original timeline, when Fauxlivia and our Olivia are in their opposite universes, the thing that makes our Olivia remember her real life and try to escape is the memory of Peter. In the new timeline, he doesn't exist. When Walternate has found and synthesised the Cortexiphan, he says that our Olivia is no longer necessary and to kill her. How did she get back to our universe with no memories of Peter, and no alternate Broyles helping her to escape and being sent to us dead with one leg?