Eye of the Cat (1969)
Eye of the Cat is a 1969 film directed by David Lowell Rich. It stars Michael Sarrazin and Gayle Hunnicutt. The story is about two people who come to the house of a rich, elderly woman whose nephew is planning to rob her of her riches. Before they go any further, they must get past a number of cats that seem to know what is going on, then the old woman. The screenplay is by Joseph Stefano, best known as the author of the script for Hitchcock's Psycho and his work on The Outer Limits.
More at Wikipedia.