 In the scene at the dock, watchful viewers will notice the stern of  the U.S. Coast Guard Cutter Alert as the camera pans toward Russ  and Zadok. The Alert just happened to be docked where the scene was  shot, and the cinematographer lined up the shot so the name of the  boat was visible, but no one noticed until editing that the name of  the cutter was the same as the ship in H.P. Lovecrafts story The  Call of Cthulhu.