| Year | Title | Role | Notes | Ref(s) |
|---|
| 1954 | The Canadian Howdy Doody Show | Ranger Bob | | |
| 1955 | Encounter | Lucky / Billy Budd | 2 episodes | |
| 1957 | Studio One | Dr. David Coleman / Kenneth Preston / Dr. Franck | 5 episodes, including The Defender | |
| Alfred Hitchcock Presents | Jim Whitely | Season 3 Episode 1: "The Glass Eye" | |
| 1958 | A Town Has Turned to Dust | Jerry Paul | Playhouse 90 television play by Rod Serling | |
| 1958 | The Ed Sullivan Show | Robert Lomax | November 16, 1958 episode; portrayed Robert Lomax on an in-show portrayal of The World of Suzie Wong | [9] [10] |
| 1959 | Nero Wolfe | Archie Goodwin | "Count the Man Down" - unsold pilot. | [11] [12] |
| 1960 | Alfred Hitchcock Presents | John Crane | Season 5 Episode 26: "Mother, May I Go Out to Swim?" | |
| One Step Beyond | Carl Bremer | Episode: "The Promise" | |
| 1960–1963 | The Twilight Zone | Bob Wilson / Don Carter | 2 episodes | |
| 1961 | Thriller | Paul Graves / Gil Thrasher | |
| 1961–1965 | The Defenders | Various | 5 episodes | |
| 1962 | Naked City | Maung Tun / Roger Barme | 2 episodes | |
| 1963 | Alexander the Great | Alexander the Great | Television pilot | |
| Premiere - Presented by Fred Astaire | Doctor Lloyd | Episode: "Million Dollar Hospital" | |
| The Nurses | Dr. Adam Courtlandt | Episode: "A Question of Mercy" | |
| Route 66 | Menemsha Faxon | Episode: "Build Your Houses with Their Backs to the Sea" | |
| 1964 | The Outer Limits | Brig. Gen. Jeff Barton | Episode: "Cold Hands, Warm Heart" | |
| The Man from U.N.C.L.E. | Michael Donfield | Episode: "The Project Strigas Affair" | |
| Burke's Law | Arthur Reynolds | Episode: "Who Killed Carrie Cornell?" | |
| 1965 | The Fugitive | Tony Burrell | Episode: "Stranger in the Mirror" | |
| For the People | David Koster | 13 episodes | |
| Twelve O'Clock High | Major Kurt Brown | Episode: "I Am the Enemy" | |
| 1965–1969 | The Virginian | Henry Swann / Luke Milford | 2 episodes | |
| 1966 | The Big Valley | Brett Skyler | Episode: "A Time to Kill" | |
| Gunsmoke | Fred Bateman | Episode: "Quaker Girl" | |
| Dr. Kildare | Dr. Carl Noyes / Toby Cunningham, M.D. | 6 episodes | |
| 1966–1969 | Star Trek: The Original Series | James T. Kirk | Main role; 3 seasons | |
| 1969 | Medical Center | Dr. Eli Neily | Episode: "The Combatants" | |
| 1970 | Sole Survivor | Lt. Col. Josef Gronke | Television film | |
| The F.B.I. | Artie | Episode: "Antennae of Death" | |
| The Andersonville Trial | Lt. Col. Chipman | Television film | |
| 1970–1974 | Ironside | Bill Parkins / Don Brand / Marty Jessup | 4 episodes | |
| 1971 | Vanished | Dave Paulick | Two-part made-for-TV movie (NBC) | |
| 1971–1972 | Owen Marshall: Counselor at Law | Gary / District Attorney Dave Blankenship | 2 episodes | |
| Mission: Impossible | Tommy Kroll / Joe Conrad | |
| 1972 | The Hound of the Baskervilles | George Stapleton | Television film | |
| The People | Dr. Curtis | |
| Hawaii Five-O | Sam Tolliver | Episode: "You Don't Have to Kill to Get Rich, but It Helps" | |
| The Sixth Sense | Edwin Danbury | Episode: "Can a Dead Man Strike from the Grave?" | |
| Four Economic Functions of Capitalism | William Shatner | Four-part made-for-TV documentary (Phillips Petroleum) | |
| 1973–1974 | Star Trek: The Animated Series | James T. Kirk | Voice | |
| Taylor's Inner Space | Narrator | Television series by Ron and Valerie Taylor | |
| 1973 | Incident on a Dark Street | Deaver G. Wallace | Television film | |
| The Horror at 37,000 Feet | Paul Kovalik | |
| Barnaby Jones | Phil Carlyle / Fred Williams | Episode: "To Catch a Dead Man" | |
| Mannix | Adam Langer | Episode: "Search For a Whisper" | |
| Go Ask Alice | Sam | Television film | |
| Pioneer Woman | Johnny Sergeant | |
| 1974 | Indict and Convict | Sam Belden | |
| Pray for the Wildcats | Warren Summerfield | |
| The Six Million Dollar Man | Josh Lang | Episode: "Burning Bright" | |
| Flick Flack | Host | | |
| Police Story | Sgt. Bill Keitlinger | Episode: "Love, Mabel" | |
| Kung Fu | Captain Brandywine Gage | Episode: "A Small Beheading" | |
| 1975–1976 | Barbary Coast | Jeff Cable | 14 episodes | |
| 1976 | The Tenth Level | Professor Stephen Turner | Television film | |
| 1976; 1994 | Columbo | Ward Fowler / Fielding Chase | Episode: "Fade in to Murder" and "Butterfly in Shades of Grey" | |
| 1977 | The Oregon Trail | Master Sgt. Buford Cole | Episode: "The Scarlet Ribbon" | |
| Testimony of Two Men | Adrian Ferrier | Television film | |
| Mysteries of the Gods | Narrator | Documentary | |
| 1978 | How the West Was Won | Captain Harrison | Miniseries | |
| Little Women | Professor Friedrich Bhaer | Episode: "Part II" | |
| The Bastard | Paul Revere | Television film | |
| Crash | Carl Tobias | |
| 1979 | Riel | The Barker | |
| Disaster on the Coastliner | Stuart Peters | |
| 1980 | The Babysitter | Dr. Jeff Benedict | |
| 1982 | Police Squad! | Poisoned Man | Episode: "Revenge and Remorse (The Guilty Alibi)" | |
| Madame's Place | Self | Episode: "No Fun Without Practice" | |
| The Vegetarian World | Himself: host & narrator | Documentary | [13] [14] |
| 1982–1986 | T. J. Hooker | Sergeant Thomas Jefferson "T. J." Hooker | Main role; 5 seasons | |
| 1984 | Secrets of a Married Man | Chris Jordan | Television film | |
| 1985 | The Ray Bradbury Theater | Charles Underhill | Episode: "The Playground" | |
| 1987 | The Search for Houdini | Host | Live TV Special | |
|
| 1988 | Broken Angel | Chuck Coburn | Television film | |
| 1989–1996 | Rescue 911 | Host | 7 seasons & 2 specials | |
| 1992 | The Larry Sanders Show | Himself | Episode: "The Promise" | |
| 1993 | Family of Strangers | Earl | Television film | |
| SeaQuest DSV | President Milos Teslo | Episode: "Hide and Seek" | |
| A Celebration of Horses: The American Saddlebred | Himself | Television special | |
| 1994–1996 | TekWar | Walter H. Bascom | 18 episodes | |
| 1995, 2010 | WWE Raw | Himself | Celebrity guest appearance for three episodes; two in 1995 and one in 2010. | [15] |
| 1996 | Star Trek: Deep Space Nine | Captain James T. Kirk | Archive footage used in episode: "Trials and Tribble-ations" | |
| Prisoner of Zenda, Inc. | Michael Gatewick | Television film | |
| Dead Man's Island | Chase Prescott | |
| The Fresh Prince of Bel-Air | Himself | Episode: "Eye, Tooth" | |
| 1998 | A Twist in the Tale | The Storyteller / Narrator | 15 episodes | |
| Hercules | Jason of the Argonauts | Voice; Episode: "Hercules and the Argonauts" | |
| 1999–2000 | 3rd Rock from the Sun | The Big Giant Head | 5 episodes | |
| 2002 | Futurama | Himself | Voice; Episode: "Where No Fan Has Gone Before" | |
| 2003 | Chilly Beach | The President | Voice; Episode: Dale to the Chief | |
| 2003 | A Carol Christmas | Dr. Bob / Ghost of Christmas Present | 2 episodes | |
| Space Ghost Coast to Coast | Himself | Episode: "In Memory of Elizabeth Reed" | |
| 2004 | The Practice | Denny Crane | Recurring role, 5 episodes in season 8 | |
| 2004–2008 | Boston Legal | Main role; 5 seasons | |
| 2005 | Atomic Betty | Jim Barrett | 2 episodes | |
| Invasion Iowa | Star | 10 episodes | |
| Star Trek: Enterprise | James T. Kirk | Voice; Archive audio used in episode: "These Are the Voyages..." | |
| How William Shatner Changed the World | Host | Television film | |
| 2006 | Show Me the Money | 7 episodes | |
| Comedy Central Roast of William Shatner | Roastee | Television special | |
| 2007 | Everest '82 | Norman Kelly | Miniseries | |
| Fire Serpent | Creator and co-executive producer | Television film | |
| Mars Rising | Narrator | 12 episodes | [16] |
| 2007; 2021 | WWE Hall of Fame | Himself | 2007: Inducted Jerry Lawler. 2021: Class of 2020 inductee. | [15] |
| 2008–2011 | Shatner's Raw Nerve | Host | 39 episodes | |
| 2010–2011 | $#*! My Dad Says | Dr. Edison "Ed" Milford Goodson | 18 episodes | |
| Aftermath with William Shatner | Host | 12 episodes | |
| 2010–2012 | Weird or What? | 30 episodes | |
| 2011–2012 | Psych | Frank O'Hara | 2 episodes | |
| 2011 | Comedy Central Roast of Charlie Sheen | Roaster | Television special | |
| 2012 | Rookie Blue | Henry McLeod | Episode: "The First Day of the Rest of Your Life" | |
| Have I Got News for You | Host | 1 episode | |
| 2013 | Hot in Cleveland | Sally | Episode: "It's Alive" | |
| 85th Academy Awards | James T. Kirk | Television special | |
| Kelly Clarkson's Cautionary Christmas Music Tale | NBC Television Executive | |
| The Captains Close Up | Host/James T. Kirk | Documentary; Also actor, interviewer, and director | [17] [18] |
| 2014 | The Shatner Project | Himself | 6 episodes | [19] |
| Chaos on the Bridge | Interviewer | Documentary; Also writer and director | [20] |
| 2015 | WWE Breaking Ground | Narrator | WWE Network documentary; 10 episodes | |
| Murdoch Mysteries | Mark Twain | Episode: "Marked Twain" | |
| Haven | Croatoan | 4 episodes | |
| 2015–present | Clangers | Narrator | Voice; English dub | |
| 2016 | Cutthroat Kitchen | Himself | Episode: "The One With William Shatner" | |
| 2016–2018 | Better Late Than Never | 12 episodes | |
| 2017 | My Little Pony: Friendship Is Magic | Grand Pear | Voice, episode: "The Perfect Pear" | [5] |
| 2017, 2019 | Private Eyes | Norm Glinski | 2 episodes | |
| 2017 | The Indian Detective | David Marlowe | 4 episodes | |
| 2019 | The Big Bang Theory | Himself | Episode: "The D&D Vortex" | [21] |
| Star Trek: Short Treks | James T. Kirk | Voice; Archive audio used in episode: "Ephraim and Dot" | |
| 2019–present | The UnXplained | Host | | |
| 2021 | WWE PPV | William Shatner | Episode: "WrestleMania 37" | |
| My Life Is Murder | Barton Wallwork | Episode: "Sleep No More" | |
| I Don't Understand with William Shatner | William Shatner | | |
| Shatner in Space | Himself | Made-for-TV documentary (Amazon) | [22] |
| 2022 | The Masked Singer | Knight | Eliminated in first episode | |
| 2023 | Stars on Mars | Himself | Presenter | |
| 2024 | Masters of the Universe: Revolution | King Keldor / Skeletor | Voice; Main role | |
| TBA | The Elevator | Ben | Completed | |
