Pistachio is incorrectly identified as a Golden Retriever when she is actually a Yellow Labrador, which is an entirely different breed.
During the end credits Constables Crabtree and Higgins encounter the traveler looking for his journal. They find a page with a drawing of Totonto's famous CN Tower (built in 1976), which he tells them once stood here at "Front and John" streets and was once the tallest free-standing structure in the world [until 2007 when surpassed by the Burj Khalifa]. He then tells them that Canada is celebrating its 150th anniversary. These were all true statements in 2017 when the episode was filmed but since the episode takes place just after the turn of the 20th Century, his statements are anachronistic indicating that the "traveler" may actually be of the "time traveler" variety.
The priest, that Detective Watts is talking to, is wearing his hat (called a biretta) 180 degrees the wrong way. There are 3 wings (vanes) on top of the hat. The side with the wing missing is worn on the priest's left. The actor playing the priest has the side without the wing on his right.