In the first scene, the firefighters are gathered on an overnight shift, watching a scene from Frankenstein (1931) on their television. Universal Studios produced both Frankenstein (1931) and Emergency! (1972) and thus owned the rights to the clip.
When Gage and DeSoto return from their first short run, which has taken at least forty-five minutes to an hour, the television is still playing the same scene from Frankenstein (1931) that was on when the bell rang.
The second time the paramedics go to the Teal home, Mrs. Teal is sitting in the living room. On the side table next to her chair is the October 23, 1972 issue of U.S. News & World Report.
When Johnny and Roy make the second visit to the Teal house, the same shot of them being awoken is used from the previous episode (Johnny's right arm on his face).