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Appearances
Fringe
Guest cast, played by Leonard Nimoy
- Episode 1x17: Bad Dreams (Apr 21, 2009)
- Episode 1x20: There's More than One of Everything (May 12, 2009)
- Episode 2x04: Momentum Deferred (Oct 8, 2009)
- Episode 2x10: Grey Matters (Dec 10, 2009)
- Episode 2x20: Brown Betty (Apr 29, 2010)
- Episode 2x22: Over There: Part 1 (May 13, 2010)
- Episode 2x23: Over There: Part 2 (May 20, 2010)
- Episode 3x19: Lysergic Acid Diethylamide (Apr 15, 2011)
- Episode 4x19: Letters of Transit (Apr 20, 2012)
- Episode 4x21: Brave New World: Part 1 (May 4, 2012)
- Episode 4x22: Brave New World: Part 2 (May 11, 2012)
Guest cast, played by Anna Torv
- Episode 3x16: Os (Mar 11, 2011)
- Episode 3x17: Stowaway (Mar 18, 2011)
- Episode 3x19: Lysergic Acid Diethylamide (Apr 15, 2011)