In the first few minutes, Detective Murdoch and Doctor Ogden look up at a broken window. Two minutes later, when Detective Murdoch and Constable Crabtree look out the window of that room, the broken wood and glass look different.
During the reveal at the end, the movement behind Murdoch jumps about. It is clearly not happening as he has set it up, but rather by a computer image.
Inspector Brackenreid uses a flyswatter, but the flyswatter wasn't invented until 1905. This episode was set in 1901