The fifteenth season of Murdoch Mysteries is promising to be the longest one yet.

After a day of shooting on set, Yannick Bisson zoomed in with his dog Gracie from his car to spill on the hit series.

"It's 24 episodes this year. This is the first time we've ever done so many. I love it when they add some twists in. This year, one of the big dreams is going to come true. It requires very tiny little twins to pull it off," Bisson said.

Murdoch Mysteries airs Saturday nights on Ovation TV.