When Carlos is looking at the "Where are the heroes" graffiti, his hands are at his sides from behind, but in his pockets from the front.
When the receptionist at Lumier pulls the revolver on Noah, the hammer is not cocked, then cocked, then not cocked, then cocked again. Also the closed caption says [safety clicks]; there's no safety on the revolver. cc should have said [cocks hammer].
When Collins is looking at the newspaper in the ice cream parlour (around 34 minutes) his left arm is resting on the edge of the table but when the shot changes to a side view his arm is resting on his leg.
Signs at Canadian border control stations are always in both official languages (French and English).
In one of the opening shots. A woman rams her car forward and backward into cars around them in a line. The forward impact was more than enough to have set off the airbag in the car.
The graphic novel that Ren gives Miko opens the wrong direction. Japanese books open left to right, not right to left. The book he gave her was "Western" oriented (opens right to left).
Quebec passenger vehicles do not have front licence plates (they were abolished in 1979). Also, they are in the "123 ABC" format, unlike that shown in the beginning of the episode.
A news reporter is heard to say that Odessa is in "Central Texas." Odessa and Midland, however, are located in West Texas.