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Appearances
Heroes
Main cast, played by Robert Knepper
- Episode 4x08: Once Upon a Time in Texas (Nov 2, 2009)
- Episode 4x09: Shadowboxing (Nov 9, 2009)
- Episode 4x10: Brother's Keeper (Nov 16, 2009)
- Episode 4x11: Thanksgiving (Nov 23, 2009)
- Episode 4x12: The Fifth Stage (Nov 30, 2009)
- Episode 4x13: Upon This Rock (Jan 4, 2010)
- Episode 4x14: Let It Bleed (Jan 4, 2010)
- Episode 4x15: Close to You (Jan 11, 2010)
- Episode 4x16: Pass/Fail (Jan 18, 2010)
- Episode 4x17: The Art of Deception (Jan 25, 2010)
- Episode 4x18: The Wall (Feb 1, 2010)
- Episode 4x19: Brave New World (Feb 8, 2010)
Guest cast, played by Robert Knepper
- Episode 4x01: Orientation (Sep 21, 2009)
- Episode 4x02: Jump, Push, Fall (Sep 21, 2009)
- Episode 4x03: Ink (Sep 28, 2009)
- Episode 4x04: Acceptance (Oct 5, 2009)
- Episode 4x05: Hysterical Blindness (Oct 12, 2009)
- Episode 4x06: Tabula Rasa (Oct 19, 2009)
- Episode 4x07: Strange Attractors (Oct 26, 2009)