Doctor Who - The Wasp and the Unicorn
I loved it. A great light-hearted fun episode...and I'm a huge Agatha Christie fan (I think I have read all of her books, most of them several times) so I thoroughly enjoyed all the Christie in-jokes - I think I will have to watch it again just to count the number of her book titles in the dialogue. Very clever usage of her real life disappearance, and I thought the actress who played her was very well cast.
Although Professor Peach in the library with the lead piping was Cluedo rather than Christie - maybe her books were the inspiration for Cluedo though, I suppose.
I was very pleased that I spotted both the thief clue (posh people don't say 'toilet'!) and the murderer (when he said 'one is never alone with God' that showed he was too good a clergyman to be true) - yes okay, that was a random lucky guess.
Didn't see the trailer for next week as my husband gets annoyed by themgiving away plot points, but apparently they go to "the biggest library in the universe" - I am professionally interested. :)