In the previous episode, Si gives Stefan a pistol that was originally owned by Stefan's older brother Jamie. When Si gives it to Stefan he tells him it is a "Browning 9mm." When Stefan returns to the care home, he pulls the gun out and looks at it, and it is clearly stamped on the side "Fabrique Nationale Herstal" (aka FN Herstal)
At 35 minutes, when Dushane is pursued by the police in the ghetto, he is about to jump over a simple fence and one second later, he actually jumped over a wall.