Aired as an installment of ABC's "Wide World of Mystery" series on October 29, 1974.
Cloris Leachman and Ned Beatty died within five months of each other; Leachman on January 27th, 2021 and Beatty on June 13th, 2021.
This was made a year after Ned Beatty (as a tourist) was famously attacked by hillbillies in his first movie, Deliverance, and now he's a marauding redneck attacking tourists.
The Mitchell car is a 1973 Chevrolet Caprice Classic Estate Wagon.
This movie has a Twilight Zone vibe, which fits since Richard Matheson wrote many Zone episodes.