Mysteries invoking Shakespeare are often difficult to write about. Being analytical without giving spoilers is difficult.
Bardfilm circumvents that difficulty by, in this instance at least, being merely informative! An episode of Inspector Lewis is set among a small theatre troupe putting on The Merchant of Venice. Would anyone care to speculate on the murder weapon? In any case, the episode itself is well done (although the themes of the Shakespeare play aren't integrated into the show itself to any great degree). Here's the opening sequence, which shows the director being perhaps a bit too harsh on the actors. Enjoy!
Links: The Episode at IMDB.