Security was pretty tight tonight ( probably since they are on hiatus until 1'st of Jan and this is last filming for this year ), our photogs got harassed by security people quite a few times, Lex Luthor aka Michael Rosenbaum was seen a few times around the facility driving around, indicating he was probably in the tonight's scene. Most of the filming was done inside the large warehouse building, with another possible scene setup outside at the bay's door with an parked ambulance ( can anyone guess what this is for ? ). The actor's trailers were parked just at the fence, where the CN rail goes through.