This movie is unpredictable, suspenseful, and superbly acted.
Add to this the fact that it is based on a true story, and you will be hooked; read the book after the movie.
It is a sad story about greed, murder, madness and family. Lee Remick is excellent, although physically she is different from the actual Frances, her acting ability transcends this. Both sons, Larry and Marc, are tragically intertwined in this story; This movie is worth watching,unlike so many TV movies; If you are still intrigued, read Jonathan Coleman's "Ät Mother's Request", which delineates the true story, delves into psychology and motives behind the madness. It is well worth it.