When Johnny and Roy first arrive at "Station 86," they talk about how beautiful the area is. Johnny says the line "If I ever bought a house, It'd be here." At the time, Randolph Mantooth owned a ranch in nearby Lobo Canyon, which was about five miles from the filming location in Agoura, California. Unfortunately, the ranch would be destroyed in a 1979 brush fire, two years after this episode aired.
The station where Roy and Johnny are trapped is listed as Station 86. It is actually filmed at Station 65 in Agoura Hills. Although in the hills, it is about a mile off the 101 freeway, with no bridges separating the two.