| Year | Title | Role | Notes |
| 1999 | Odd Man Out | Connor Williams | Episode: "You've Got Female" |
| 2000 | Undressed | Wade | 4 episodes |
| Gilmore Girls | Party Guy at Concert | Episode: "Concert Interruptus" |
| 2001–2002 | One Life to Live | Seth Anderson | Recurring role |
| 2003 | Cold Case | Young Henry Phillips | Episode: "A Time to Hate" |
| 2004 | Will & Grace | Sebastian | Episode: "A Gay/December Romance" |
| Oliver Beene | Brian | Episode: "Dibs" |
| 2005 | Awesometown | Officer Dino Wong | Television short |
| 2006 | The Batman | John Marlowe / Everywhere Man (voice) | Episode: "The Everywhere Man" |
| 2008 | Fear Itself | Bobby | Episode: "Community" |
| 2010–2011 | Chuck | Daniel Shaw | 12 episodes |
| 2012–2013 | Partners | Wyatt Plank | 13 episodes |
| 2013–2014 | Chosen | Max Gregory | 6 episodes |
| 2013 | Newsreaders | Miles Van Cleef | Episode: "Hedge Fun" |
| 2014 | The Exes | Steve | 2 episodes |
| Enlisted | Brandon Stone | 2 episodes |
| The Millers | Officer Dixon | Episode: "Carol's Surprise" |
| The Nine Lives of Christmas | Zachary Stone | Television film |
| 2014–2016, 2020 | Arrow | Ray Palmer / The Atom | 21 episodes |
| 2015–2016, 2019, 2021–2022 | The Flash | 5 episodes |
| Clark Kent / Superman (Earth-96) | Episode: "Crisis on Infinite Earths: Part Three" |
| 2016–2021 | Legends of Tomorrow | Episode: "Crisis on Infinite Earths: Part Five" |
| Ray Palmer / The Atom | Main role (Seasons 1–5), Special guest (season 7) |
| 2016 | Vixen | Web series; voice role; 3 episodes |
| Lady Dynamite | Jack Tripper | Episode: "Jack and Diane" |
| 2017 | Vixen: The Movie | Ray Palmer / The Atom | Voice role |
| 2019 | Black-ish | Banner Copeland | Episode: "Is It Desert or Dessert?" |
| Are You Afraid of the Dark? | Theo Coscarelli | Episode: "Part Two: Opening Night" |
| Supergirl | Ray Palmer / The Atom | Episode: "Crisis on Infinite Earths: Part One" |
| Batwoman | Episode: "Crisis on Infinite Earths: Part Two" |
| Clark Kent / Superman (Earth-96) | Episode: "Crisis on Infinite Earths: Part Two" |
| 2020 | Home Movie: The Princess Bride | Westley | Episode: "Chapter Six: The Fire Swamp" |
| 2021 | The Rookie | Officer Doug Stanton | Recurring role (Season 3); 5 episodes |
| The Nine Kittens of Christmas | Zachary Stone | Television film |
| Slugfest | Joe Simon | Roku Channel documentary series |
| With Love | Leo | Recurring role |
| 2023 | Quantum Leap | XO Alexander Augustine | Episode: "S.O.S." |
| Scott Pilgrim Takes Off | Todd Ingram | Voice role |
