An adventure featuring the First Doctor, Susan, Ian & Barbara.
The Doctor and his companions land on a spaceship orbiting a distant and mysterious world, where a human crew lie frozen somewhere between life and death.
The planet is the Sense-Sphere, home of the Sensorites, beings of immense intelligence and power. Unable to leave, the Doctor and his companions must deduce the Sensorites’ intentions: are they friendly, hostile, or frightened? And what is the deadly secret at the heart of the Sense-Sphere?
This story was originally broadcast on BBC1 between 20th June - 1st August 1964
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