In the scene where Gil and Sara are sitting on the bed watching a movie, the movie they are watching is 'Gorgo' (1961). One of Gil's lines in this scene is "...just wait until they use the oxygen destroyer on him." The "Oxygen Destroyer" is from 'Gojira' (1954), not 'Gorgo' (1961).
The woman who was killed and had her head mounted on the wall was depicted as a blonde throughout the episode, but after Nick and Warrick confirm the bullets match, the scene shows a brunette with long hair being shot.