Fringe - Season 2 - Eps 23: Over There (2)
Walternate asks Peter to help complete the device, while the fugitives Walter and Olivia are reunited with William Bell. Meanwhile, the alternate world's Fringe Division closes in on the invaders, and Peter must make a life-shattering decision.
About Fringe

Title: Fringe
First Air Date: 2008-09-09
Last Air Date: 2013-01-18
Status: Ended
Rating: 8.1/10 (from 2545 votes)
Language: EN
Seasons: 6
Total Episodes: 100
Network: FOX
Genres: Sci-Fi & Fantasy, Drama, Mystery
Production Companies: Warner Bros. Television, Bad Robot
Synopsis
FBI Special Agent Olivia Dunham, brilliant but formerly institutionalized scientist Walter Bishop and his scheming, reluctant son Peter uncover a deadly mystery involving a series of unbelievable events and realize they may be a part of a larger, more disturbing pattern that blurs the line between science fiction and technology.
Cast

Anna Torv
Olivia Dunham

Joshua Jackson
Peter Bishop

Jasika Nicole
Astrid Farnsworth

John Noble
Walter Bishop