Doctor Who poster

TV series

Doctor Who

1963TV-PG26 seasons7.9 / 10

The adventures of The Doctor, a time-traveling humanoid alien known as a Time Lord. He explores the universe in his TARDIS, a sentient time-traveling spaceship. Its exterior appears as a blue British police box, which was a common sight in Britain in 1963 when the series first aired. Along with a succession of companions, The Doctor faces a variety of foes while working to save civilizations, help ordinary people, and right many wrongs.

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Where to watch in United States

Checked Jul 22, 2026

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Synopsis

The adventures of The Doctor, a time-traveling humanoid alien known as a Time Lord. He explores the universe in his TARDIS, a sentient time-traveling spaceship. Its exterior appears as a blue British police box, which was a common sight in Britain in 1963 when the series first aired. Along with a succession of companions, The Doctor faces a variety of foes while working to save civilizations, help ordinary people, and right many wrongs.

Season 21 episodes

Choose an episode, then use the watch options above for the show.

← Season 20

Episode 1

Warriors of the Deep (1)

25m5.1 / 10

Earth's ocean floor, 2084. With two superpowers poised on the brink of a devastating photonic war, a missile base comes under attack from the reptilian Sea Devils and Silurians, intent on eradicating the upstart human race and reclaiming the planet…

Episode credits

Directed by Pennant RobertsWritten by Johnny ByrneGuest stars Nitza Shaul, Nigel Humphreys, Ian McCulloch, Ingrid Pitt, James Coombes, Tom Adams, Stuart Blake, Martin Neil

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Episode 2

Warriors of the Deep (2)

25m5.3 / 10

Just as the Doctor gains a tentative trust from the humans, a Silurian battle cruiser approaches. The Doctor warns Commander Vorsha to hold his fire and find out what they want, but is the level-headed commander one who'll listen?

Episode credits

Directed by Pennant RobertsWritten by Johnny ByrneGuest stars Nitza Shaul, Nigel Humphreys, Ian McCulloch, Ingrid Pitt, Tom Adams, Stuart Blake, Martin Neil, Tara Ward

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Episode 3

Warriors of the Deep (3)

25m5.5 / 10

As Vorshak's crew are cut down by Sauvix's Sea Devil Warriors, the Doctor is running out of ways to broker a peace between the opposing species.

Episode credits

Directed by Pennant RobertsWritten by Johnny ByrneGuest stars Ingrid Pitt, Tom Adams, Stuart Blake

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Episode 4

Warriors of the Deep (4)

25m5.3 / 10

With Silurians in control of the base, Icthar reveals his plan for a final solution to Earth's human problem, which presents the Doctor a great moral dilemma.

Episode credits

Directed by Pennant RobertsWritten by Johnny ByrneGuest stars Tom Adams, Stuart Blake

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Episode 5

The Awakening (1)

26m6.5 / 10

The sleepy English village of Little Hodcombe, 1984. The village re-enactment of the English Civil War is in full swing, but a malign alien presence intends the mock-battles to be rather more realistic than planned...

Episode credits

Directed by Michael Owen MorrisWritten by Eric PringleGuest stars Polly James, Glyn Houston, Denis Lill, Jack Galloway

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Episode 6

The Awakening (2)

25m5.8 / 10

The Malus, an alien that's purely evil, needs the civil war re-enactments to become authentic so it can feed off the psychic energy of dying and embattled men and fully revive. Not if the Doctor can derail things, of course.

Episode credits

Directed by Michael Owen MorrisWritten by Eric PringleGuest stars Polly James, Glyn Houston, Denis Lill, Keith Jayne, Jack Galloway, Frederick Hall

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Episode 7

Frontios (1)

25m6.8 / 10

The planet Frontios, in the distant future. Following Earth's destruction, a tiny colony struggles to eke out a life on this desolate world. But where do the bombardments that threaten them originate from? Little does the Doctor suspect that somewhere nearby lurks a power capable of ripping even the TARDIS apart…

Episode credits

Directed by Ron JonesWritten by Christopher H. BidmeadGuest stars William Lucas

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Episode 8

Frontios (2)

25m7.1 / 10

Following the destruction of the TARDIS, the only part of it left is the hat stand. So Turlough uses it as a weapon! Plantagenet gets swallowed by the earth, and Norna and Turlough discover the Tractators.

Episode credits

Directed by Ron JonesWritten by Christopher H. BidmeadGuest stars William Lucas

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Episode 9

Frontios (3)

25m7.1 / 10

Trying to rescue the Doctor from the Tractator's trap, Tegan lands them both in even more trouble. Turlough goes a bit mad, and reckons he knows the evil of the Tractators from old.

Episode credits

Directed by Ron JonesWritten by Christopher H. BidmeadGuest stars Lesley Dunlop, William Lucas, Peter Gilmore, Jeff Rawle

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Episode 10

Frontios (4)

25m7.1 / 10

The Doctor tries to deal with the Tractator's cunning plan, despite Turlough's best intervention. They discover the splintered TARDIS in the tunnels beneath the planet's surface, but how will they put it together again?

Episode credits

Directed by Ron JonesWritten by Christopher H. BidmeadGuest stars William Lucas

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Episode 11

Resurrection of the Daleks (1)

46m8.4 / 10

London's Docklands, 1984. Why are uniformed policemen gunning down strangely-dressed vagrants in broad daylight? A prison ship in the far future - who is the sole prisoner aboard the craft? And why are these two locations linked by the time corridor the TARDIS has been sucked into?

Episode credits

Directed by Matthew RobinsonWritten by Eric SawardGuest stars Rula Lenska, Rodney Bewes, Terry Molloy, Maurice Colbourne, Royce Mills, Chloe Ashcroft, Philip McGough, John Scott Martin

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Episode 12

Resurrection of the Daleks (2)

46m8.0 / 10

As the surviving station crew work to destroy the space station, Davros consolidates his power and the Daleks launch a fiendish scheme to use the Doctor against the Time Lords.

Episode credits

Directed by Matthew RobinsonWritten by Eric SawardGuest stars Rula Lenska, Rodney Bewes, Terry Molloy, Maurice Colbourne, Royce Mills, Chloe Ashcroft, Leslie Grantham, Philip McGough

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Episode 13

Planet of Fire (1)

25m6.6 / 10

Lanzarote, 1985. Archaeologist Howard Foster raises a strange metal artefact from the sea floor. But how is it linked to the signal the TARDIS received? Why is Turlough suddenly so worried? And why is Kamelion acting so erratically?

Episode credits

Directed by Fiona CummingWritten by Peter GrimwadeGuest stars Edward Highmore, Peter Wyngarde, Dallas Adams, Barbara Shelley, Anthony Ainley, James Bate, Jonathan Caplan, Michael Bangerter

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Episode 14

Planet of Fire (2)

25m6.8 / 10

While the Master, victim of his own attempt to improve his TCE weapon, seeks restoration through Sarn's numismaton gas, the truth of Turlough's past comes out at last, though to guarantee the safety of his brother and the Sarn people, Turlough must consider a great personal sacrifice.

Episode credits

Directed by Fiona CummingWritten by Peter GrimwadeGuest stars Edward Highmore, Peter Wyngarde, Dallas Adams, Barbara Shelley, Anthony Ainley, James Bate, Simon Sutton, Jonathan Caplan

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Episode 15

Planet of Fire (3)

24m6.7 / 10

Sarn prophesy foretells of an outsider who will come to aid the people. It's a role the Master is more than delighted to fill, which finally presents Timanov, the Sarn religious leader, the unbridled support he's sought in his campaign to cull the faithless from among his people. Turlough's secret past, however, is somehow intricately involved in all this, and the reluctance of its disclosure is enough to threaten all friendly ties with the Doctor.

Episode credits

Directed by Fiona CummingWritten by Peter GrimwadeGuest stars Edward Highmore, Dallas Adams, Barbara Shelley, Anthony Ainley, James Bate, Jonathan Caplan

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Episode 16

Planet of Fire (4)

25m6.5 / 10

While the Master, victim of his own attempt to improve his TCE weapon, seeks restoration through Sarn's numismaton gas, the truth of Turlough's past comes out at last, though to guarantee the safety of his brother and the Sarn people, Turlough must consider a great personal sacrifice.

Episode credits

Directed by Fiona CummingWritten by Peter GrimwadeGuest stars Edward Highmore, Peter Wyngarde, Dallas Adams, Barbara Shelley, Anthony Ainley, James Bate, Jonathan Caplan, John Alkin

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Episode 17

The Caves of Androzani (1)

25m8.5 / 10

The planet Androzani Minor, the distant future. In the planet's caves war rages between government troops and the android warriors of the mysterious Sharaz Jek. But what makes spectrox, the substance they battle to control, so valuable? And how far will the Doctor go to protect his companion?

Episode credits

Directed by Graeme HarperWritten by Robert HolmesGuest stars Christopher Gable, Robert Glenister, John Normington, Maurice Roëves, Roy Holder, David Neal, Barbara Kinghorn

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Episode 18

The Caves of Androzani (2)

26m8.6 / 10

The Doctor and Peri have been rescued from the firing squad by the mysterious Sharaz Jek. But he has his own plans for them. And why are they suddenly feeling ill?

Episode credits

Directed by Graeme HarperWritten by Robert HolmesGuest stars Christopher Gable, Robert Glenister, John Normington, Maurice Roëves, Roy Holder, David Neal, Barbara Kinghorn

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Episode 19

The Caves of Androzani (3)

25m8.6 / 10

The situation on Androzani Minor is building toward a violent confrontation, and the Doctor and Peri are slowly succumbing to spectrox toxemia.

Episode credits

Directed by Graeme HarperWritten by Robert HolmesGuest stars Christopher Gable, Robert Glenister, John Normington, Maurice Roëves, Roy Holder, David Neal, Barbara Kinghorn

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Episode 20

The Caves of Androzani (4)

26m8.8 / 10

Events on Androzani reach a bloody climax. Will the Doctor and Peri survive the carnage? And at what cost?

Episode credits

Directed by Graeme HarperWritten by Robert HolmesGuest stars Colin Baker, Mark Strickson, Matthew Waterhouse, Sarah Sutton, Christopher Gable, Robert Glenister, John Normington, Maurice Roëves

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Episode 21

The Twin Dilemma (1)

25m4.8 / 10

Earth, the future. The genius Sylvest twins, child prodigies, are kidnapped by the mysterious Professor Edgeworth and taken to the planet Jaconda. But who is Edgeworth? Why does he serve the giant slug Mestor? And what is Mestor's plan?

Episode credits

Directed by Peter MoffattWritten by Anthony StevenGuest stars Kevin McNally, Maurice Denham, Edwin Richfield, Helen Blatch, Dennis Chinnery, Oliver Smith

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Episode 22

The Twin Dilemma (2)

26m5.7 / 10

The Doctor takes Peri to Titan 3, a desolate hunk of rock in space where he hopes to find some solitude for a while. Instead he finds the lone but unconscious survivor of a recent spaceship crash in sight of a mound-shaped complex where no formalised structure should exist.

Episode credits

Directed by Peter MoffattWritten by Anthony StevenGuest stars Kevin McNally, Maurice Denham, Edwin Richfield, Dennis Chinnery

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Episode 23

The Twin Dilemma (3)

25m5.1 / 10

The Doctor arrives on Jaconda, once lush and green, to find it completely devastated by giant gastropods. Old legends about the planet's half-human/half-slugs weren't just myths after all. With or without help from the Doctor and his unpredictable mood swings, Lt. Lang is up for rescuing the twins, who are finally informed of the grand purpose they've been brought to Jaconda to accomplish.

Episode credits

Directed by Peter MoffattWritten by Anthony StevenGuest stars Kevin McNally, Maurice Denham, Edwin Richfield, Seymour Green, Oliver Smith, John Wilson

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Episode 24

The Twin Dilemma (4)

26m5.0 / 10finale

The Doctor and Edgeworth deduce that the real plan of Mestor, the gastropod ruler of Jaconda, will not only destroy Jaconda but lead to the devastation of other planets. Together they hope to thwart him despite his formidable ability at slipping into people's minds and controlling them.

Episode credits

Directed by Peter MoffattWritten by Anthony StevenGuest stars Colin Baker, Kevin McNally, Maurice Denham, Edwin Richfield, Seymour Green, Oliver Smith

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Episode information updated Jul 24, 2026

More about Doctor Who

Cast

William HartnellThe Doctor
Jon PertweeThe Doctor
Patrick TroughtonThe Doctor
Katy ManningJo Grant
Roger DelgadoThe Master
Tom BakerThe Doctor
Peter DavisonThe Doctor
Sylvester McCoyThe Doctor

Credits

Created by
Verity Lambert, Sydney Newman, Donald Wilson, C. E. Webber

Production details

Status
Ended
Series type
Scripted
Episodes
694
Original language
English

Networks & production

  • BBC OneUnited Kingdom
  • BBC TelevisionUnited Kingdom
  • BBCUnited Kingdom

Themes

admiringaliencomfortingexcitedhistorical revisionismhumanoidnonlinear narrativeparallel universe