Lincoln and Bolivia go over the case on this episode of Fringe, "The Consultant." It's the 18th installment of season 4.
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Fringe Season 4 Episode 18 Quotes

I understand, but this level of surveillance involves a lot of red tape. I'll cut through it.

Alt-Broyles

Walter: Feel it Peter.
Peter: Oh really, can I?
Walter: He's dead, Peter, you can't hurt him.
Peter: Not really what I was concerned about.