In the pilot episode of "Boris Karloff's Thriller" we have the great Leslie Nelson as a business executive, he has it all looks, money, a loving wife, and a cute little daughter, however one day he is confronted by a strange younger woman played by Natalie Trundy who he always finds staring at him. She actually works at the same office he does and has fallen in love with him. Nelson rejects her advances and pretty soon she's calling his house and sending notes of infidelity to his wife who is starting to suspect that he is indeed conducting an affair with her. Elsewhere another young office worker played by George Grizzard is having problems with his life, he grew up in an abusive family (particularly his sister) and has dreams of reaching the heights of Nelson who he pretty much idolizes, however he doesn't know the means to go about it and is always constantly late for his job and in trouble. Eventually he crosses paths with Trundy's character and things really start to get bad. Overall this is a pretty pedestrian affair much like fellow reviewer hitchcoc stated its full of holes, and character motives are head scratching at times, also add to the fact it just seems to end without any proper conclusion doesn't help it either. Nelson is great as is the rest of the cast, but, this is largely forgettable.