Personnel Officer Drew Heriot returns to England after working in Australia to discover his brother behaving oddly, to the distress of his sister-in-law Anne. Investigating together they discover that a disembodied alien force is using high frequency signals to brainwash people - including Drew's brother - into committing subversive acts, as a prelude to a full-scale invasion. Together, Drew and Anne battle to stop the acts of sabotage while trying to alert the authorities to the danger
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1x01
Onset of Fear
aired May 08, 1965
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