I think the real letdown of the show was the lack of diagnosis and the relative simplicity of the cases. Right off the bat Tucci knows what the problem is and since they don't show the actual surgeries a lot of the excitement and suspense is lost. All that was left was the drama of the character interplay and the Tucci's hallucinations, which sadly, it appears will never be explained. My attitude is, if you're going to make a show about the brain use cases that require diagnosis that would be unique to the brain rather than just difficult tumors. Nonetheless, I must admit I did enjoy watching it and am disappointed it is getting canceled.