Fringe - Season 2 - Eps 19: The Man From The Other Side
Two teenagers turn up dead and evidence indicates that shapeshifters have borrowed their forms for some special mission. While the Fringe team tries to track them down, Peter grows increasingly suspicious of Walter's secretive behavior.
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