Heartland‘s Amber Marshall guest stars as Annie Oakley in Murdoch Mysteries Season 19, coming to Acorn TV in March. The Real Housewives of New York City star Countess Luann de Lesseps will also be back in the new season. AMC Networks announced the Murdoch Mysteries Season 19 cast and premiere date on Acorn TV on Wednesday, February 4, about one month before the season arrives on the streaming platform. Murdoch Mysteries airs on Ovation TV before it comes out on Acorn TV. TV Insider previously announced the Season 19 Ovation premiere date. It premiered on Monday, October 6, 2025, at 8/7c on Ovation. Set in Toronto in the early 1900s during the age of invention,…
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