Throughout the series, Dr. Daniel Auschlander suffers from late-stage Liver Cancer and yet he is seen repeatedly as drinking "very good" Scotch after hours with his staff in his office. Alcohol consumption only aggravates Liver Cancer and hastens death.
The goof item below may give away important plot points.
Throughout the final season (1987-1988), the elevated Orange
Line train is seen in the opening credits. However, the elevated line was torn down and relocated in April 1987, thus making its appearance anachronistic during the final season. However, all of the series except for the last scene was revealed to be a dream within an autistic boy's head, so the appearance of the elevated Orange Line train in 1987 would be an error on the part of the character.