The first time I saw Endgame, I thought it would be your usual "brillant guy shows all the cops and those with real know-how how to solve crimes." The show is nothing like that. Endgame's protagonist has a phobia that will not let him leave the hotel he is staying at. After his wife's murder, he was so traumatized that he could no longer be part of the "real world," unless it is through quips of his knowledge and intellect.
The supporting cast literally marvels at his genius and scoffs at his arrogance.
Every character in every episode plays a relevant part in telling the story.
In one hour, we see one of television's most vulnerable characters show everybody what he feels and sees.
Great show, Do yourself a favor and watch it if you can.