Svetlana Tsiolkovsky is James Pendrick's assistant introduced in Season 9 of Murdoch Mysteries, portrayed by Christine Horne.

Appearances and Mentions

24 Hours Til Doomsday

  • Svetlana Tsiolkovsky is the (fictional) daughter of Russian rocket scientist Konstantin Tsiolkovsky with whom James Pendrick has fallen in love with and has made his assistant and partner.
  • Svetlana is duped by Allen Clegg who manipulates her desire to have Pendrick create a brave new world by bringing to mankind all the benefits of science – into Clegg's own weapon.

Staring Blindly into the Future

  • Having serviced her time in jail, Svetlana Tsiolkovsky and returns to Toronto to attend the James Pendrick Symposium on his behalf.


  • Russian rocket scientist Konstantin Eduardovich Tsiolkovsky (1857-1935) did have a daughter but her name was Lyubov. She was arrested for engaging in revolutionary activities.


Murdoch Mysteries Recurring Actors and Characters
Daniel Maslany as Detective WattsShanice Banton as Violet HartLachlan Murdoch as Henry HigginsArwen Humphreys as Margaret BrackenreidCharles Vandervaart as John BrackenreidClare McConnell as Effie NewsomeBea Santos as Louise CherryPeter Keleghan as Terrence MeyersPeter Stebbings as James PendrickMatthew Bennett as Allen CleggNigel Bennett as former Chief Constable Giles • Siobhan Murphy as Ruth NewsomeShailene Garnett as Nomi JohnstonStephanie Belding as Nurse SullivanSebastian Pigott as Dr. DixonColin Mochrie as Ralph FellowsJames McGowan as Dr. ForbesPatrick McKenna as Hamish SlorachDmitry Chepovetsky as Nikola TeslaJohn Tench as Alexander Graham BellMartin Moreau as Theodore RooseveltCyrus Lane as Rupert NewsomeCraig Brown as Eddie CrawfordDavid Reale as Mr. ClementsErin Agostino as Nina BloomMouna Traoré as Rebecca JamesJordan Johnson-Hinds as Nate DesmondDylan Neal as Jasper LinneyKristian Bruun as Constable JacksonRichard Clarkin as Chief Constable DavisMichael Seater as James GilliesRothaford Gray as Alderman William Peyton HubbardCyrus Lane as Roger NewsomeGeorgina Reilly as Emily GraceCharlotte Sullivan as Charlotte (formerly Minerva Fairchild)Sean Harraher as Constable WorseleyTamara Hope as Edna Brooks (née Garrison)Giacomo Gianniotti as Leslie GarlandNicole Underhay as Margaret HaileSarah Gadon as Ruby OgdenKate Greenhouse as Sally PendrickStephen McHattie as Harry MurdochGeraint Wyn Davies as Arthur Conan Doyle
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