In pre production, this was known as " Wyler " , and it was intended as a starring vehicle for Terence Stamp.
New scenes were added to the network showing to make it "less intense." The Network-TV version has a different last half-hour, replacing the plot's supernatural element and an army of killer housecats with one somewhat-menacing housecat and a person with a paranoid delusion. This was made from outtakes and a few new scenes filmed in 1971, shortly before it aired.
English