Year	Title	Role	Notes
1995	Extreme	Jack Hawkins	2 episodes
1995	JAG	Weapons Officer	"Episode: ""Shadow"""
1996	Sliders	Sid	"Episode: ""El Sid"""
1996	In the Blink of an Eye	Jessie Tafero	Television film
1996–1997	The Burning Zone	Dr. Edward Marcase	Main cast
2000	Walker, Texas Ranger	Jake Horbart	"Episode: ""Child of Hope"""
2001	ER	Firefighter Larkin	"Episode: ""The Crossing"""
2002	The Practice	Daniel Glenn	"Episode: The Test"""
2002	JAG	CIA Technician Wally	2 episodes
2002	Angel	Sam Ryan	"Episode: ""Provider"""
2002	The Division	Father William Natali	"Episode: ""Forgive Me, Father"""
2003	CSI: Crime Scene Investigation	Undercover Agent #1	"Episode: ""All for Our Country"""
2003	Star Trek: Enterprise	Xindi-Reptilian	"Episode: ""Carpenter Street"""
2004	The Handler	Mike	2 episodes
2004	Tru Calling	Geoffrey Pine	"Episode: ""Two Pair"""
2004	Monk	Steven Leight	"Episode: ""Mr. Monk Takes Manhattan"""
2005	The O.C.	Joe Zukowski	"Episode: ""The Accomplice"""
2005	Weeds	Judah Botwin	2 episodes
2005–2007; 2019	Supernatural	John Winchester/Azazel	Recurring; 13 episodes
2006	Jam	Dale	Television film
2006–2009	Grey's Anatomy	Denny Duquette	Recurring (seasons 2–3, 5); 23 episodes
2012–2013	Magic City	Ike Evans	Main role
2014	Shameless	Charlie Peters	"Episode: ""Lazarus"""
2015	The Secret Life of Marilyn Monroe	Joe DiMaggio	2 episodes
2015	Texas Rising	"""Deaf"" Smith"	Television miniseries
2015	Extant	JD Richter	Main role
2015–2016	The Good Wife	Jason Crouse	Main role (season 7)
2016–present	The Walking Dead	Negan	31 episodes Special guest star (season 6) Main cast (season 7–present) Won (2016) – Saturn Award for Best Guest Performance in a Television Series
2017	Robot Chicken	Negan	"Voice; Episode: ""The Robot Chicken Walking Dead Special: Look Who's Walking"""
2017–2019	Ride with Norman Reedus	Himself	2 episodes