Peter gets help from Martha Plimpton in this photo from the episode "Northwest Passage." The hour focuses on Peter's search for clues about his past.
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Peter looks for clues about his past on the episode "Northwest Passage." Season two of Fringe is inching toward its conclusion.
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Martha Plimpton is seen here in her guest-starring stint on Fringe. She appears on the 5/6/10 episode of the show.
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Fringe Season 2 Episode 20 Quotes

I don't know who I am anymore.

Peter

Peter: I'm sorry. I needed to know your blood was still red.
Mathis: What other color would it be?