J
- Barry Jackson
- Ascaris, The Romans (1965)
- Jeff Garvey, Galaxy 4, Mission to the Unknown (1965)
- Drax, The Armageddon Factor (1979)
- Inigo Jackson
- Zentos, The Ark (1966)
- Michael J. Jackson
- Sir Geoffrey, The King's Demons (1983)
- Derek Jacobi
- Professor Yana/The Master, "Utopia" (2007)
- Frederick Jaeger
- Jano, The Savages (1966)
- Sorensen, Planet of Evil (1975)
- Professor Marius, The Invisible Enemy (1977)
- Emrys James
- Aukon, State of Decay (1980)
- Godfrey James
- Tarn, Underworld (1978)
- Polly James
- Jane Hampden, The Awakening (1984)
- Raji James
- Dr. Rajesh Singh, "Army of Ghosts" - "Doomsday" (2006)
- Robert James
- Lesterson, The Power of the Daleks (1966)
- High Priest, The Masque of Mandragora (1976)
- Louise Jameson
- Companion Leela, The Face of Evil (1977) - The Invasion of Time (1978)
- Frank Jarvis
- Corporal, The War Machines (1966)
- Ankh, Underworld (1978)
- Skart, The Power of Kroll (1978-1979)
- Martin Jarvis
- Hilio, The Web Planet (1965)
- Butler, Invasion of the Dinosaurs (1974)
- Governor, Vengeance on Varos (1985)
- Keith Jayne
- Will Chandler, The Awakening (1984)
- Michael Jayston
- Valeyard, The Trial of a Time Lord (1986)
- Colin Jeavons
- Damon, The Underwater Menace (1967)
- Peter Jeffrey
- Colony Pilot, The Macra Terror (1967)
- Count Grendel, The Androids of Tara (1978)
- Rory Jennings
- Tommy Connolly, "The Idiot's Lantern" (2006)
- Paul Jerricho
- The Castellan, Arc of Infinity, "The Five Doctors" (1983)
- Robert Jewell
- Dalek Operator, The Daleks (1963/1964), The Dalek Invasion of Earth (1964), The Chase (1965), Mission to the Unknown (1965), The Daleks' Master Plan (1965/1966), The Power of the Daleks (1966), The Evil of the Daleks (1967)
- Zarbi, The Web Planet (1965)
- Clown, The Daleks' Master Plan (1965)
- Macra Operator, The Macra Terror (1967)
- Robert Jezek
- Sergeant Zbrigniev, Battlefield (1989)
- Ronny Jhutti
- Danny Bartock, "The Impossible Planet" - "The Satan Pit" (2006)
- Caroline John
- Liz Shaw, Spearhead from Space - Inferno (1970), "The Five Doctors" (1983)
- Leee John
- Mansell, Enlightenment (1983)
- Margaret John
- Megan Jones, Fury from the Deep (1968)
- Grandma Connolly, "The Idiot's Lantern" (2006)
- Milton Johns
- Benik, The Enemy of the World (1967–1968)
- Guy Crayford, The Android Invasion (1975)
- Castellan Kelner, The Invasion of Time (1978)
- Stratford Johns
- Monarch, Four to Doomsday (1982)
- Corey Johnson
- Henry van Statten, "Dalek" (2005)
- Noel Johnson
- Thous, The Underwater Menace (1967)
- Charles Grover M.P., Invasion of the Dinosaurs (1974)
- Ellis Jones
- Technician, Spearhead from Space (1970)
- Emrys Jones
- The Master, The Mind Robber (1968)
- Glyn Jones
- Krans, The Sontaran Experiment (1975)
- Mark Jones
- Arnold Keeler, The Seeds of Doom (1976)
- Melville Jones
- Guard, The Time Monster (1972)
- First Cyberman, Revenge of the Cybermen (1975)
- Norman Jones
- Khrisong, The Abominable Snowmen (1967)
- Major Baker, Doctor Who and the Silurians (1970)
- Hieronymous, The Masque of Mandragora (1976)
- Toby Jones
- The Dream Lord, "Amy's Choice" (2010)
- Paterson Joseph
- Roderick, "Bad Wolf" - "Parting of the Ways" (2005)
- Jo Joyner
- Lynda Moss, "Bad Wolf" - "Parting of the Ways" (2005)
- Chris Jury
- Kingpin/Deadbeat, The Greatest Show in the Galaxy (1988/1989)
Read more about this topic: List Of Doctor Who Cast Members