Continuity mistake: When Anne and Evert are driving toward the Norwegian/Swedish border, Anne pulls back the rug in the back of the sled, and discovers the dead Bjørn. He is then flat on his back, staring upwards. Moments later, when the Swedish border guards pull back the rug to look at the corpse, he is face down. No one touched him, and the sled did not bump enough to roll the body completely over.
The Mind of Simon Foster - S3-E23
Continuity mistake: When the pawnbroker closes his metal gate, he's facing the wire mesh. When the shot cuts, he's instantly facing away from it. (00:10:15)
Revealing mistake: When Bjornson is in Oslo he calls Catherine, who is still in Alesund, from a pay phone. But located behind him is a poster listing emergency numbers for the municipality of Giske, revealing that this scene was filmed there, just outside of Alesund.