"The Perfect Tennant" can perhaps best adequately be summarized as a run-of-the mill thriller. While it is not unwatchable, it is not particularly good either and it contributes nothing to the genre
Most of the actors perform their roles well. Maxwell Caulfield does a good job in portraying a psychotic and cold-blooded individual haunted by memories of his childhood and determined to act upon his beliefs. Earl Holliman is also excellent and very convincing as Jessica's father and gives a great deal of depth and dimension to his character even though it is a relatively minor one in the whole scheme of the movie. Tracey Nelson does a fine job in her role as a mental patient who is being used and manipulated by Caulfield The actress who plays Caulfield's character's sister also improves in her acting toward the end of the movie.
But unfortunately Linda Purl does not perform well in her role as one of the major characters. She appears much too stiff and wooden and lacks the depth and the emotion required to be a success in that particular character role. The same is true of the actress who plays her daughter.
In all fairness to the actors and actresses, however, they are not given a very good script to work from. The dialogue is quite often clichéd and tedious and some of the one-liners are so melodramatic and over the top that they are absolutely hilarious. The whole plot is predictable if you're a fan of the genre and you can more or less guess what will happen long before it unfolds. And the first part of the movie is disjointed and confusing and hard to follow Probably due to the performance of Caulfield and the supporting cast against all the odds, this movie is not as bad as it could be. But there are much better movies in this genre "The Hand that Rocks the Cradle" comes to mind
