Riveting, chilling performance by Paul Gross -- who plays the creepily charming evil twin to the Due South incorruptible decent Mountie he played on TV for years. Did I say chilling? Also disturbing, without needing to have gratuitous violence or a serial killer in it! Based on the book about Patrick Kelly, a real undercover RCMP officer accused of murdering his first wife -- one of the only things they could even try pinning on him.
The story and performances are worthy of a feature film -- production values decent, too, so you won't be distracted by lack thereof, as often happens in MOW. The title is lousy, however -- this is anything but an Agatha Christie novel, although you will be wondering if, indeed, he "dunnit" or not. Worth your two hours.