Fringe (2008)

Phillip Broyles: Someone out there is experimenting, only the whole world is their lab.

The Arrival - S1-E4

Trivia: Michael Cerveris makes his first significant appearance in this episode as The Observer/Bald Man. However if you watch the series from the beginning, he makes fleeting appearances in every episode, sometimes on a tv screen.

Jeff Walker

Olivia - S3-E1

Question: Why would Olivia be so quick to believe John was a traitor? In one episode, she tells her sister that there were documents and evidence but, the evidence could have been planted and documents can be forged.