Dave Levac (born April 6, 1954) is the current Speaker of the Legislative Assembly of Ontario.
Due to an incident with a previous film crew, a ban on lights has made shooting on location at Queen's Park almost impossible for nearly a decade. When the then Lieutenant Governor of Ontario David C. Onley (until 2014) proposed an episode of Murdoch Mysteries set in the historic building, he had to convince Levac, as well as the Sargent-at-Arms, to allow the production. This was made easier by the fact that Levac is also a Murdoch Mysteries fan.
In addition to providing unprecedented access to the legislative building, Levac also starred in a cameo role as the Speaker in the episode The Ghost of Queen's Park.
Due to the fact that the Speaker's uniform hasn't changed since the time the show is set, Levac didn't need a costume.