Seth Gabel has reflected on Lincoln Lee’s interaction with Olivia in the penultimate episode.
via TV Line:
I liked the brief indication that he felt some remorse, or guilt, that he’d been Over There the whole time that our side was getting run roughshod by the Observers.
Yeah, there was a little bit of doubt – “Did I make the right choice? ” — because Lincoln sees that Olivia is suffering. He wonders, “Was I meant to stay in my own universe? Is it wrong that I’m over here enjoying myself and having a family when I could have been over there helping her and Peter? Maybe if I was over there, their child wouldn’t have died?” So there is a level of guilt. But at the end of the day, she gives him her blessing, saying that things seem like they’re supposed to be the way they are.