Hidden Depths has to be one of the very best episodes of Midsomer Murders, it combines all essential elements needed for a murder mystery, and just when you think it's done its job, it surprises you even more, with an unbelievably good ending.
The story is excellent, it's a clever, twisted tail of deception and revenge. The murders are among the best in any episode, it's about now that the writers were looking for more bizarre and obscure killing methods, sometimes they went completely overboard, but here they manage to stay within the limits of reality. The wine bottle murder is perhaps the best in the show's history, and the fact that a relative is made to watch makes it all the better. It's amusing too, Joyce has some great moments, as does Scott.
I really enjoyed the performances of Oliver Ford Davies and Robert Daws, they play two of the most obnoxious, loathsome guys ever seen on the show, but they both do so brilliantly. Nancy Carroll is also excellent, whatever drama she appears in there seems to be a running joke about her husband being spoken about, but always absent, will we ever see Lady Felicia's husband Monty (Father Brown.)
It's creative, twisted, funny, it's a classic, 10/10