"Murdoch and the Undetectable Man" is the thirteenth episode of the twelfth season of the Murdoch Mysteries and the one hundred eighty-first of the series. It first aired on January 28, 2019.


Murdoch enlists inventor Nikola Tesla to help with the murder investigation of a man experimenting with invisibility.

The murder victim Julius Bosworth was an inventor who had been corresponding with Nikola Tesla on his methods and theory. He had written that he was close to success and wanted Tesla to share in it. But when Tesla arrived, Bosworth is found dead and some of his equipment has been removed from his laboratory. Mr. Bosworth was working on a device to render objects invisible.

Character Revelations

  • Dr. Ogden stops by the Station House with the manuscript of the handbook and asks Geroge if he would give it a quick read, "Or, if you'd like to try your hand at improving it."
  • Murdoch and Ogden’s manuscript puts George to sleep.
  • Brackenreid is back but not at home; He has a flat in a house further down his street, but he has treated himself to a Edison and cigars.
  • George comes up with the perfect name for Murdoch and Ogden’s book as he edits their manuscript.


  • Inspector Brackenreid returns to Station House No. 4, as well as Nikola Tesla.
  • The Toronto neighbourhood surrounding Station House No. 4 continues to grow as the metropolis expands.
  • Tesla and Murdoch work on a new invention: Tele-Vision, mentioned during their earlier work together in Power. Modulating the electrical waves transmitted and received at the same resonant frequency, Tesla sent voice over airwaves then, now images.
  • Crabtree has some interesting thoughts on the disadvantages of invisibility like an "invisibles hole", one can fall in and break one's leg.
  • Murdoch employs the mirror trick Dr. Roberts used in Twentieth Century Murdoch to explain the invisible screwdriver.

Historical References

  • This episode takes place in Toronto 1906 – Edward VII (Albert Edward;1841-1910) is King of the United Kingdom of Great Britain and Ireland and of the British Dominions beyond the Seas.
  • The Invisible Man by H.G. Wells: the science fiction story was originally serialized in Pearson's Weekly in 1897, then published as a novel the same year.
  • Annalan Der Physik, one of the oldest scientific journals on physics since 1799, published Einstein's Relativity Paper and the "Light Quantum" (Volume 322, Issue 10) in 1905.
  • Albert Einstein, German-born theoretical physicist, develops the theory of relativity, one of the two pillars of modern physics alongside quantum mechanics.
  • Brackenreid listens to La Bohème, an opera in four acts, composed by Giacomo Puccini (see ep.505).



Main Cast

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 Cast

Lachlan Murdoch as Constable Henry Higgins
Shanice Banton as Violet Hart
Dmitry Chepovetsky as Nikola Tesla

Guest Cast

Tara Yelland as Fiona Rossini
Anna Hardwick as Verna Jones
Elvis Stojko as Sam Marshall
Jonathon Champagne as Simon Alvin
Jamie Champagne as Ted Alvin
Jonathan Ho as Arcade Manager
Sam Kantor as Adam Bester
Sean Gallagher as Constable

Non-Credited Cast

Nathan Hoppe as Constable McNabb


Murdoch Mysteries Season 12
Murdoch Mystery MansionOperation: MurderMy Big Fat Mimico WeddingMurdoch Without Borders
The Spy Who Loved MurdochSir. Sir? Sir!!!Brother's KeeperDrowning in MoneySecrets and Lies
Pirates of the Great LakesAnnabella CinderellaSix of the BestMurdoch and the Undetectable Man
Sins of the FatherOne Minute to MurderManual for MurderDarkness Before the Dawn Part 1
Darkness Before the Dawn Part 2
Season 1Season 2Season 3Season 4Season 5Season 6Season 7Season 8Season 9Season 10Season 11Season 12
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