What the heck happened here? Walter looks into an incident on a train.
Added:
There's an unsettling incident on a train on the episode "White Tulip." Olivia looks into it here.
Added:
Peter and Olivia confer in this scene from "White Tulip." It's the 4/15/10 episode of the show.
Added:
All three of the main stars of Fringe are pictured here. This is a shot from the episode "White Tulip."
Added:
Peter takes a look around in this scene from Fringe. It's courtesy of the episode "White Tulip."
Added:
There's an unsettling incident on a train on the Fringe episode "White Tulip." Peter is seen here from it.
Added:

Fringe Season 2 Episode 17 Quotes

I happen to know someone who is fluent in gobbley goop.

Olivia

It's not our place to adjust the universe.

Walter