Here’s a small miracle for you: nineteen seasons in, and Murdoch Mysteries is still this much fun. Another Brick in the Wall is a confident, cornucopian episode – stuffed to the brim with a compelling mystery, whimsical humour, personal drama, a cast member in peril, and more costume glory than a theatre wardrobe department on opening night. And yet, for all that abundance, it never feels overstuffed.