Add together; the fictional world of 1950's private dick, a successful modern day writer affected by the tragic loss of his fun, throw in altering realities, a good dose of drama and Stephen King's style and you end up with this episode.
It is a very enjoyable way to spend an hour. One of the best told stories, expertly presented on the small screen. There actually isnt much to this story. Its not your regular whodunnit though you will find enough sadness and tragedy to keep you watching to see how events unfold.
It is the underlying complexity of the episode's reality though, that makes for an intriguing plot. Coupled with deep metiphorical meaning in every aspect of the story, from story background to characters, screenplay, dialogue, locations, etc - there is alot for those of us who dig this type of existential, philosphical story.
Macy is just superb playing both of the linked roles, carrying off both characters with aplomb, while drama of the unfolding situation and their fortures morph and gradually reverse bringing an ending full of resonance, yet gratifyingly unfinished.
I must point out though, that the beginning felt somewhat clumsy, overly energetic and rushed. However, looking back it feels very much in the style of the classic 50s/60s dectective whodunnits.... surreally so!
The middle act was totally different to the first, presenting the intriguing situation of writer meeting his creation and his creation realising his situation. The way King has Umney interpret modern day parphinaelia had me giggling.
Overall, this episode is more than a success and in essentially a series classic... due alot to Macy's acting abilities.