The Sea of Death (S01E21)
S01E21
On the alien planet of Marinus, an era of tranquility has prevailed for many years, thanks to a mind-altering device called the Conscience. However, the Voord, a formidable race, have gained resistance to its influence. As a result, Arbitan, the guardian of the Conscience, is compelled to hide its essential control keys across the landscape. Seeking assistance, he turns to the time travelers to help retrieve them. Their quest will lead them through an extraordinary odyssey, fraught with dangers at every turn...
Show
Doctor Who
Episode
S01E21
Air Date
Apr 11, 1964
Season 1 Episodes
S01E01
An Unearthly Child
S01E01
Holiday Knights
S01E02
The Cave of Skulls
S01E02
Sins of the Father
S01E03
The Forest of Fear
S01E03
Cold Comfort
S01E04
The Firemaker
S01E04
Never Fear
S01E05
The Dead Planet
S01E05
You Scratch My Back
S01E06
The Survivors
S01E06
Double Talk
S01E07
The Escape
S01E07
Joker's Millions
S01E08
The Ambush
S01E08
Growing Pains
S01E09
The Expedition
S01E09
Mean Seasons
S01E10
The Demon Within
S01E10
The Ordeal
S01E11
Over the Edge
S01E11
The Rescue
S01E12
Torch Song
S01E12
The Edge of Destruction
S01E13
Love is a Croc
S01E13
The Brink of Disaster
S01E14
The Roof of the World
S01E15
The Singing Sands
S01E16
Five Hundred Eyes
S01E17
The Wall of Lies
S01E18
Rider from Shang Tu
S01E19
Mighty Kublai Khan
S01E20
Assassin at Peking
S01E21
The Sea of Death
S01E22
The Velvet Web
S01E23
The Screaming Jungle
S01E24
The Snows of Terror
S01E25
Sentence of Death
S01E26
The Keys of Marinus
S01E27
The Temple of Evil
S01E28
The Warriors of Death
S01E29
The Bride of Sacrifice
S01E30
The Day of Darkness
S01E31
Strangers in Space
S01E32
The Unwilling Warriors
S01E33
Hidden Danger
S01E34
A Race Against Death
S01E35
Kidnap
S01E36
A Desperate Venture
S01E37
A Land of Fear
S01E38
Guests of Madame Guillotine
S01E39
A Change of Identity
S01E40
The Tyrant of France
S01E41
A Bargain of Necessity
S01E42
Prisoners of Conciergerie