Many of the reviews I've read over the years of "Dead of Night" seem to sideline the "Christmas Party" episode as being less successful and effective than the other stories involved. At first, I tended to agree with them; however, after a while it dawned on me that there was something rather unusual about the sequence that I couldn't quite place my finger on. Normally, in a ghost story, any part of the story containing the appearance of the ghost looks rather unreal in comparison with the everyday part to underline the supernatural aspect of the spectre's apparition. However, in this particular story, it's the (real) children's party that looks unreal, and the (supernatural) ghost that looks real. The party shows a massive house, with a roaring log fire, loads of toys, food, etc, and the children enjoying themselves enormously, without any adults present. It has the look of a fantasy of the perfect party any child would want. However, the meeting with the young boy seems more rooted in reality, and this is the irony of the story - that Constance Kent, the sister he mentions, actually did exist and did admit to killing her younger brother. In real life, the boy was actually a baby when he was murdered, but his age has obviously been changed so that Sally could talk to him. This gives an extra poignancy to the story, in that he likes Sally and presumably would have wanted her for his real sister, but instead had Constance, who killed him - the worst crime she could have committed against a helpless child.
I think it would be wrong to overlook this sequence as unworthy of comment, and reassess its value in "Dead of Night". It may not be as frightening as the famed ventriloquist story, but it does carry an emotional power which is perhaps its strongest point.