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Concocting A Killer

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"Concocting A Killer"
Mm1004 Concocting A Killer
Season 10
Episode 1004
Air date October 31, 2016
Written by Simon McNabb
Directed by Norma Bailey
Guest Stars Daniel Maslany as Detective Watts
Bea Santos as Louise Cherry
Previous A Study in Pink
Next Jagged Little Pill

"Concocting A Killer" is the fourth episode of Season Ten and the one hundred thirty-sixth of the Murdoch Mysteries series. It first aired October 31, 2016.


Murdoch and Ogden are faced with the possibility that they sent an innocent man to prison when the convicted murderer is released and the 12 year old case is re-opened.

Gus Shanley was sent to jail for killing his friend, Rex Landon, by putting thallium in his cocoa one night after dinner. He believed Landon was being too forward with his wife. Shanley had purchased the cocoa and thallium the day before the murder. Murdoch found the cocoa tin in Shanley's home.

The judge's report states that Shanley found a scientist in New York City who proved Dr. Ogden's initial testing could have been wrong: "Thallium mistaken for other, non-poisonous elements" in the cocoa. Twelve years ago, Dr. Ogden didn't have a spectroscope, so placing the element to a Bunsen flame was the only test available. The problem is that like thallium other metals also burns green and that's where Mr. Shanley finds a weak spot. He understands that if he can raise a question about one key piece of evidence than the entire case will be thrown out.

The Crown wants to take another look at the case and is worried that Shanley may claim prejudice if the same detective re-investigates the case: The eccentric Detective Watts from Station House No.1 is assigned the investigation. When the crucial evidence is stolen from the City Morgue followed by unflattering Toronto Gazette headlines then a new murder, the Inspector sends both Detectives to investigate the new crime scene.

Character RevelationsEdit

  • Detective Watts of Station House No. 1 is introduced for the first time; despite being a good detective in his own right—he could not be more different from Detective Murdoch.
  • William gets his back up, both for his own conviction and his confidence in Julia.
  • Crabtree discovers that constables are not the only ones who go through trash bins for evidence.


Historical ReferencesEdit

  • Throughout the 1800s, a number of scientists pushed the techniques and understanding of spectroscopy, but the spectroscope was not available in the Toronto's City Morgue until now, 1904.
  • Detective Watts makes references to Man using scapegoats since Leviticus (23:19) goat sacrifice, Karl Marx, and Kierkegaard.


  • Filmed on location at Cobourg’s Victoria Hall.
  • This episode is a takeoff on the ‘Making a Murderer’ documentary (2015).
  • "Me Ol' Mucker" Count: 1


Cast Edit

Main CastEdit

Yannick Bisson as Detective William Murdoch
Hélène Joy as Dr. Julia Ogden
Thomas Craig as Inspector Thomas Brackenreid
Jonny Harris as Constable George Crabtree

Recurring CastEdit

Mouna Traoré as Rebecca James

Guest CastEdit

Jonathan Goad as Gus Shanley
Daniel Maslany as Detective Watts
Bea Santos as Louise Cherry
Deborah Pollitt as Dorothy Ramsey
Matthew Taylor as Samuel Ramsey
Dylan Colton as Phillip Shanley Ramsey
Elisa Moolecherry as Miss Geraldine Hanover

Uncredited CastEdit

Nathan Hoppe as Constable


Murdoch Mysteries Season 10
"Great Balls of Fire, Part 1" • "Great Balls of Fire, Part 2" • "A Study in Pink" • "Concocting A Killer" • "Jagged Little Pill" • "Bend It Like Brackenreid" • "Painted Ladies" • "Weekend at Murdoch's" • "Excitable Chap" • "The Devil Inside" • "A Murdog Mystery" • "The Missing" • "Mr. Murdoch's Neighbourhood" • "From Murdoch to Eternity" • "Hades Hath No Fury" • "Master Lovecraft" • "Hot Wheels of Thunder" • "Hell to Pay" •
Season 1Season 2Season 3Season 4Season 5Season 6Season 7Season 8Season 9

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