On March 4, 2015, CBC announced Murdoch Mysteries had been renewed for a ninth season before Season 8 had even finished airing. Filming began May 19 and went until November 20. The Canadian premiere date was announced on May 28, 2015 at the CBC Upfront in Toronto. The Alibi release date for Season 9 was in January 2016. Australia aired Season 9 on November 24. The US dates: OvationTV on January 23, 2016 and AcornTV on April 25, 2016.
Additional details about the season and even a clip were also announced at that time.
"We’re probably going to work, a little more this year, at putting the team back together and see them work more as a coordinated unit."– Peter Mitchell
An elderly groom, Oliver Pym, is electrocuted at a wedding planned by Margaret Brackenreid. The bride's four previous husbands all died under mysterious circumstances, which leads Murdoch to suspect that she is a black widow. Crabtree meets and encourages Lucy Maud Montgomery while teaching a creative writing class.
Murdoch leads Station House No. 4 during a murder investigation linked to a young girl who was raised in the wild and suffers from muteness. It is discovered that the Braxtons were not Roland's biological parents, Dr. Ogden hires Winnifred "Freddie" Pink, introduced in "Summer of '75", to locate their adopted child's real parents.
A man is murdered during a performance at the Star Room, an infamous burlesque club, Murdoch, Ogden and Brackenreid discover that Crabtree was in attendance at the time. He becomes involved with one of the performers while Murdoch and Inspector Brackenreid travel to Buffalo to discover the identity of the victim.