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Appearances
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Main cast, played by David Lyons
- Episode 15x01: Life After Death (Sep 25, 2008)
- Episode 15x02: Another Thursday at County (Oct 9, 2008)
- Episode 15x04: Parental Guidance (Oct 23, 2008)
- Episode 15x05: Haunted (Oct 30, 2008)
- Episode 15x06: Oh, Brother (Nov 6, 2008)
- Episode 15x08: Age of Innocence (Nov 20, 2008)
- Episode 15x09: Let It Snow (Dec 4, 2008)
- Episode 15x10: The High Holiday (Dec 11, 2008)
- Episode 15x12: Dream Runner (Jan 15, 2009)
- Episode 15x13: Love Is a Battlefield (Jan 22, 2009)
- Episode 15x14: A Long, Strange Trip (Feb 5, 2009)
- Episode 15x15: The Family Man (Feb 12, 2009)
- Episode 15x16: The Beginning of the End (Feb 19, 2009)
- Episode 15x17: T-minus-6 (Feb 26, 2009)
- Episode 15x18: What We Do (Mar 5, 2009)
- Episode 15x19: Old Times (Mar 12, 2009)
- Episode 15x20: Shifting Equilibrium (Mar 19, 2009)
- Episode 15x21: I Feel Good (Mar 26, 2009)
- Episode 15x22: And in the End... (Apr 2, 2009)
Guest cast, played by David Lyons
- Episode 14x14: Owner of a Broken Heart (Apr 10, 2008)
- Episode 14x16: Truth Will Out (Apr 24, 2008)
- Episode 14x17: Under Pressure (May 1, 2008)
- Episode 14x18: Tandem Repeats (May 8, 2008)
- Episode 14x19: The Chicago Way (May 15, 2008)