Netflix New True Crime Docuseries Asks: Should I Marry a Murderer?

[This story contains spoilers from So I Married an Axe Murderer.]

In 1993’s So I Married an Axe Murderer, Mike Myers thought he married an axe murderer (and then he didn’t, and then he did again, and then he found out, factually, that he did not). As it turns out, the killer was Amanda Plummer’s character, not Nancy Travis’, with the axe, in whatever room(s) in which she murdered Travis’ (onscreen) ex-husbands. Myers and Travis’ Charlie and Harriet live happily ever after, probably, with the exception that she has to spend the rest of her days listening to his beat poetry.

In the 2026 Netflix docuseries Should I Marry a Murderer?, Dr. Caroline Muirhead factually knows her Scottish fiancé Alexander McKellar killed an innocent man and buried him on a farm, but she moves back in with him anyway. The title is provocative and very easy to answer (“No!”), but it is posed as a legitimate question that Muirhead faces at least twice in the three-part documentary now streaming. If right about now you are wondering, “Was she on drugs?!” Yes, yes she was.

Muirhead, a young forensic pathologist, met McKellar on Tinder, and the two begin dating. After about a month, their whirlwind romance became a whirlwind engagement. It is the typical boy-meets-girl, boy-falls-in-love-with-girl, boy-confesses-to-girl-he-killed-a-bicyclist-and-dumped-the-body-in-an-animal-burial-pit tale. Is there no original storytelling left in Hollywood?

McKellar confesses to Muirhead that he struck bicyclist Tony Parsons, who was on a 100-mile ride from Fort William back to his hometown of Tillicoultry to raise money for a prostate cancer charity. Parsons, 63, was a prostate cancer survivor, as well as a grandfather and former navy officer. McKellar and his twin brother Robert McKellar were under the influence when their pickup truck hit Parsons under the cover of night. The brothers left Parsons there before returning with a new vehicle to bring him back to the sprawling farm they both worked and lived on. Parsons was not dead upon impact; the brothers buried him in a kill pit along with some of their hunting trophies.

Muirhead had Alexander show her where Parsons was buried, and she secretly marked the spot with a can of Sugar Free Red Bull — her signature non-alcoholic drink. She went to the cops with the information, but they proceeded slowly. She gathered more intel; they still moved slowly. Eventually, the McKellar boys figured out who the snitch was. But instead of getting stitches, they forgave her. She forgave them, and life goes on — for everyone but Parsons, of course — with heavy cocaine and alcohol abuse.

At some point, Muirhead sobers up. The boys go to prison and she goes to therapy — both, long overdue.

Muirhead has since moved on, and has filmed this documentary series, and is in a new romantic relationship. She says the new boyfriend is “kind,” which is code to say that he’s probably never killed anybody or buried them under deer skulls. You have to kiss a few frogs, I suppose…

Should I Marry a Murderer? premieres Wednesday, April 29, on Netflix.