The high school yearbook showing Maddie Haskell is the same one used for Taylor Watts in the third season episode "Collateral Damage".
Title is a reference to the 1959 comedy western if the same name.
This episode contains a scene where several characters watch a police dash cam video showing an officer pulling over a car in which the policeman is then shot and killed by the driver after being distracted by a noise coming from the trunk. One of the actors watching the video, Steve Makaj, had a very similar role in The X-Files episode "Ascension", where he played a patrolman who pulls over a car and is subsequently shot and killed by the driver after being distracted by a noise coming from the trunk. The incident was also recorded by a dash cam video.