This was an excellent episode. However, Jack's brother Nicky was not even mentioned. If in the time-frame of their mother's death, Jack and Nicky were estranged, then it still made no sense that in the flashback sequences when Jack was playing with his sled in the snow and was called in for lunch by the mother, it appeared that Jack was an only child. That was not true. Nicky left the family when they were teenagers, as I remember. They grew up together, yet Nicky was not there when they were children? Seems like a gaping plot hole to me in an otherwise well-written and acted episode.