TK
T.R. Knight Filmography
| 2025 | Stranger Things: The First Shadow - Broadway · as Victor Creel |
| 2024 | Adam the First · as Jacob Jr. |
| 2020 | The Flight Attendant (TV Series) · as Davey Bowden |
| 2020 | The Comey Rule (TV Series) · as Reince Priebus |
| 2019 | The Bravest Knight (TV Series) · as Sir Cedric (voice) |
| 2018 | God Friended Me (TV Series) · as Gideon |
| 2017 | Hello Again · as Carl |
| 2017 | Will & Grace (TV Series) · as Dexter Murphy |
| 2017 | The Lavender Scare · as Drew Ference (voice) |
| 2017 | Genius (2017) (TV Series) · as Max Jacob |
| 2017 | When We Rise (TV Series) · as Chad Griffin |
| 2016 | The Catch (TV Series) · as Tommy |
| 2016 | 11.22.63 (TV Series) · as Johnny Clayton |
| 2016 | Broken · as Mark |
| 2015 | A Year and Change · as Kenny |
| 2014 | Hysteria (2014) (TV Series) · as Carter James Harlen |
| 2013 | 42 · as Harold Parrott |
| 2009 | The Good Wife (TV Series) · as Jordan Karahalios |
| 2007 | Max's Words · as Narrator |
| 2007 | Grey's Anatomy: Every Moment Counts · as Dr. George O'malley |
| 2006 | Grey's Anatomy: Complications of the Heart · as Dr. George O'malley |
| 2006 | The Last Request · as Jeff |
| 2006 | Grey's Anatomy: Under Pressure · as Dr. George O'malley |
| 2006 | Grey's Anatomy: Straight to the Heart · as Dr. George O'malley |
| 2005 | Grey's Anatomy (TV Series) · as George O'malley |
| 2002 | Garmento · as Daniel |
| 2001 | Law & Order: Criminal Intent (TV Series) · as Neil Colby |
| 2000 | CSI: Crime Scene Investigation (TV Series) · as Zero Adams |
| 1999 | Law & Order: Special Victims Unit (TV Series) · as Gabriel Thomas / Brian Smith |
| 1998 | Will & Grace (TV Series) · as Dexter Murphy |
| 1993 | Frasier (TV Series) · as Alex |
| 1969 | Sesame Street (TV Series) · as Private I |
| 2020 | Visible: Out on Television (TV Series) · as Self (actor - Grey's Anatomy) |
| 2013 | The Real Daytime (TV Series) · as Self |
| 2010 | Access Hollyood Live (TV Series) · as Self |
| 2008 | The Bonnie Hunt Show (TV Series) · as Self - Guest |
| 2007 | The 33rd Annual People's Choice Awards · as Self |
| 2007 | The 59th Annual Primetime Emmy Awards · as Self - Nominee |
| 2006 | The 60th Annual Tony Awards · as Self - Presenter |
| 2004 | The Tony Danza Show (TV Series) · as Self |
| 2003 | The Ellen DeGeneres Show (TV Series) · as Self |
| 1994 | WGN Morning News (TV Series) · as Self |
| 1988 | LIVE with Kelly and Mark (TV Series) · as Self - Guest |
| 1986 | The Oprah Winfrey Show (TV Series) · as Self - Guest |
| 1981 | Entertainment Tonight (TV Series) · as Self |
| 1975 | Good Morning America (TV Series) · as Self - Guest |
| 1952 | Today (TV Series) · as Self - Guest |