Also known as Evil in the Swamp, is a 1974 American television film directed by Burt Kennedy. It originally aired as an ABC Movie of the Week on November 12, 1974. Film was never registered for copyright with the Library of Congress. A couple traveling through a backwoods area are held by a group of orphans who want them to become their parents. Unfortunately, the kids have a habit of killing adults who refuse that particular honor.
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https://www.youtube.com/watch?v=_NClcjEns3w
Sir Lancelot is challenged by the other knights before he can become a member of King Arthur's Knights of the Round Table. He has to prove his worth and is put through a series of rigorous tests. Guest stars: Andrew Crawford as Sir Gawaine, Peter Bennett as Leonides, Brian Worth as Sir Kay, Paul Hansard as Sir Lionel, Edwin Richfield as Sir Christopher
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https://www.youtube.com/watch?v=9Tv7_GwHd7Y