An Evil Streak is a three-part British television psychological drama series, created and written based on the novel by Andrea Newman published in 1977.
The series stars Trevor Eve and Rosalind Bennett, and follows Gemma Clarkson (Bennett), has been led astray by her godfather, Alex Kyle (Eve), ever since she was a little girl.
Now she is older his obsessive influence becomes even more sinister as he manipulates her into an extra-marital affair.
[1] A scheming uncle leads his married niece into an affair with an out of work actor.
And it was a voyeuristic pervert convinces his male housekeeper to manipulate a young woman into an extramarital affair.