Nick must wrestle with the demons of his past on the 9/12/10 episode of The Gates. It's titled "Surfacing."

The Gates Season 1 Episode 11 Quotes

Peg: Nick, anything we discussed is privileged. You can trust me.
Nick: I've been seeing things, things that can't be real.

Devon; And how long have these nightmares been going on?
Sarah: Uh, about three weeks.
Devon: Nightmares are often driven by a conflict between the conscious and subconscious.