Out of the Unknown

Season 1, Episode 3: Stranger in the Family

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A young man, known as 'Boy', is born with no fingernails and with mental powers that enable him to control others. He falls for a young actress, initially repulsed, whose agent-boyfriend encourages the relationship because he thinks Boy's powers can be used to make a lot of money via TV commercials. But he is being hunted by a mysterious surveillance team who have moved into the next-door flat in the tower block where he lives...