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Doctor Who
Season 4 • Episode 21 • The Underwater Menace (3)
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Doctor Who Season 4, Episode 21: The Underwater Menace (3)
The Doctor and Ramo are sentenced to be sacrificed to the goddess Amdo and must escape to put a stop to Zaroff's plan. Watch Doctor Who Season 4, Episode 21 The Underwater Menace (3) in HD free online. Enjoy high-quality streaming of Doctor Who Season 4, Episode 21 and share your thoughts in the comments below!
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Episodes
43 episodes
The Smugglers (1)
The Doctor discovers Polly and Ben aboard the TARDIS shortly before the ship arrives in 17th century Cornwall, where the local churchwarden gives the Doctor a cryptic message shortly before being murdered.
25 min
The Smugglers (2)
Pike is convinced that the Doctor knows the location of Avery's treasure while Polly and Ben try to convince the locals they were not responsible for Longfoot's murder.
25 min
The Smugglers (3)
Polly and Ben are placed in the custody of Blake, who reveals he also has his suspicions about the Squire, while the Doctor and Kewper are forced to team up to escape from Pike's ship.
25 min
The Smugglers (4)
The Doctor and his friends are at the mercy of Cherub, who is now seeking Avery's treasure for himself, while Pike prepares to attack the village.
25 min
The Tenth Planet (1)
In 1986 a new planet appears in the Solar System which turns out to be a long-lost twin of Earth's named Mondas. Its inhabitants are the Cybermen.
23 min
The Tenth Planet (2)
The Doctor's warnings are ignored and the Cybermen take over the base, hampering the crew's efforts to help Zeus IV.
23 min
The Tenth Planet (3)
With the Doctor out of action, it is up to Polly, Ben and Barclay to stop Cutler using the Z-Bomb and devastating half the world.
24 min
The Tenth Planet (4)
The Cybermen take over the base again, apparently to stop the humans using the Z-Bomb, but then the Doctor realises they intend to use it themselves to destroy Earth.
25 min
The Power of the Daleks (1)
The TARDIS arrives on the Earth colony of Vulcan where the newly-regenerated Doctor assumes the identity of an Earth Examiner.
25 min
The Power of the Daleks (2)
While the Doctor worries about the inert Daleks in the capsules, Lesterson makes plan to reactivate one of them.
25 min
The Power of the Daleks (3)
The Doctor fails to convince the colonists of the danger posed by the Daleks and soon the other two are also reactivated.
25 min
The Power of the Daleks (4)
With Polly being held prisoner by the rebels, the Doctor and Ben decide to investigate them, while Lesterson discovers the Daleks are reproducing.
25 min
The Power of the Daleks (5)
The Doctor and Quinn attempt to escape in order to stop Bragen using the Daleks to take over the colony.
25 min
The Power of the Daleks (6)
With Bragen having taken over, the Daleks trick the rebels into turning them loose and only the Doctor can stop them wiping out the entire colony.
25 min
The Highlanders (1)
The Doctor, Polly and Ben arrive in 1746, in the aftermath of the Battle of Culloden, and are captured by a group of Highlanders shortly before they themselves are captured by redcoats.
25 min
The Highlanders (2)
Polly and Kirsty capture Lieutenant Ffinch to try and enlist his help while the Doctor tricks Grey in order to escape.
25 min
The Highlanders (3)
With the Highlanders imprisoned aboard Trask's ship, the Doctor attempts to expose Grey's plan.
25 min
The Highlanders (4)
Ben manages to join up with the Doctor, Polly and Kirsty and together they work to free the Highlanders from Trask's ship before Grey sells them into slavery.
25 min
The Underwater Menace (1)
The TARDIS materialises on a deserted beach where the Doctor and his friends are captured by primitive warriors and taken to the fabled city of Atlantis.
25 min
The Underwater Menace (2)
While Ara tries to save Polly from being turned into a Fish Person and Ben and Jamie try to escape from the mines, the Doctor discovers the full extent of Zaroff's plans.
25 min
The Underwater Menace (3)
The Doctor and Ramo are sentenced to be sacrificed to the goddess Amdo and must escape to put a stop to Zaroff's plan.
24 min
The Underwater Menace (4)
With Zaroff's plan nearing completion, the Doctor and Ben realise the only way to save the world is to destroy Atlantis.
25 min
The Moonbase (1)
The TARDIS arrives on the Moon in the year 2070.When Jamie is injured, the other travellers are forced to seek the help of a moonbase afflicted with a space plague.
25 min
The Moonbase (2)
The Doctor and his friends attempt to convince the Moonbase crew that the Cybermen are responsible for the disappearances and find a cure for the plague.
25 min
The Moonbase (3)
The Cybermen take over the Moonbase and begin using the Gravitron to attack Earth but Polly, Ben and Jamie come up with a way to fight back.
25 min
The Moonbase (4)
With the Cybermen preparing to launch a full attack, the Doctor and his friends must keep the Moonbase and the Gravitron out of their hands until help arrives from Earth.
25 min
The Macra Terror (1)
The TARDIS arrives at a holiday camp company with the crew worried by a prediction of giant crabs and the Doctor becomes interested in the apparent madman Medok's stories of creatures that roam the colony at night.
25 min
The Macra Terror (2)
The Doctor is unable to convince the colonists that the Macra exist and an attempt to brainwash his companions results in Ben betraying his friends.
25 min
The Macra Terror (3)
The Doctor, Polly and Jamie are sentenced to work in the pits and an escape attempt sees Ben's loyalties called into question again.
25 min
The Macra Terror (4)
The Doctor and Polly manage to save Jamie from the Macra and then try to show the Pilot who is really in charge of the colony.
25 min
The Faceless Ones (1)
The TARDIS materialises on the runway of Gatwick Airport, where Polly witnesses a murder only to be kidnapped before she can report it.
25 min
The Faceless Ones (2)
With Polly having apparently forgotten them, the Doctor, Ben and Jamie decide to carry out their own investigation of Chameleon Tours.
25 min
The Faceless Ones (3)
The Doctor, Jamie and Sam manage to convince Crossland to trust them and he persuades the Commandant to let them continue their investigation.
25 min
The Faceless Ones (4)
When Spencer attempts to kill them, the Doctor, Jamie and Sam become convinced Chameleon Tours are hiding something and Sam decides to book a ticket on one of their flights.
25 min
The Faceless Ones (5)
Jamie finds himself aboard the Chameleons' satellite and meets their Director while the Doctor forces the Chameleon Meadows to tell him the aliens' plans.
25 min
The Faceless Ones (6)
The Doctor and Pinto are captured by the Chameleons but the Doctor manages to use their dependence on their human originals to create dissent in their ranks.
25 min
The Evil of the Daleks (1)
Trying to find the stolen TARDIS, the Second Doctor and Jamie are lured into a trap by the Doctor's old enemies the Daleks.
25 min
The Evil of the Daleks (2)
The Doctor and Jamie investigate Waterfield's antiques shop, where they are knocked unconscious and transported back to the 19th century.
25 min
The Evil of the Daleks (3)
As part of the Daleks' experiment, the Doctor manipulates Jamie into attempting to rescue Victoria.
25 min
The Evil of the Daleks (4)
Jamie and Kemel team up to try and find Victoria, while the Doctor and the Daleks continue to monitor their progress.
25 min
The Evil of the Daleks (5)
With the experiment at an end, the Doctor begins to suspect the key to rescuing Jamie, Victoria and Kemel from the Daleks lies with Terrall.
25 min
The Evil of the Daleks (6)
The Doctor, Jamie and Waterfield follow the Daleks to Skaro, where they discover an unforeseen consequence to their experiment.
25 min
The Evil of the Daleks (7)
The Daleks are poised to spread the Dalek Factor throughout the history of Earth and begin by implanting the Doctor.
25 min