Quite a surprising documentary of a mass Viking grave found in the UK, with bodies in one pit, and heads in another. Clears up the mystery of why they were there and how Christianity bloods the so-calls "heathens" in 10th century Britain. It can be watched online at National Geographic or streamed on Netflix, if you have it.
Christmas Moment: the murderer deliberately tries to fool Poirot into thinking he is bad at disguises which causes Poirot the remark that he looks like Santa Claus.
If you have an Amazon Prime account, you can watch it here rental free or add it to a Blu Ray watchlist.
This can be watched free online at the CBS website (Amazon Prime link here). Classic first season episode of the original series! This is the one with the famous "salt creature" alien, which is officially called the "M-113 creature" in Star Trek annals.
