Murdoch Mysteries returns with a bumper 24 episode for season 15.Based on novels by Maureen Jennings, “Murdoch Mysteries” follows detective William Murdoch. In a series of stories taking place in Toronto during the 1890s and early 1900s, several challenging murder cases arise. Murdoch uses up-and-coming forensics techniques and an unconventional approach, which often elicit skepticism from his fellow officers and his boss.Coroner Julia Ogden becomes Murdoch’s number one ally, and they make a top-notch team, but he must struggle against tradition and prejudice to solve some of the city’s most-gruesome murders.