Lynda Day George was married to guest star Christopher George until his sudden death in 1983. Unlike most married actors, they frequently worked together on the same projects.
The place where Wendell Hoyes hides the gas canister is at Griffith Park Observatory.
Guest star Tyne Daly's father, actor James Daly, previously guest-starred on two earlier episodes: Shock (1967) and The Bank (1967).
In the last Act when the vehicles are driving down the city street they pass a Texaco station selling gasoline at 26.9 cents a gallon. If adjusted for inflation that would be about $1.75 a gallon. This was about two years before the OPEC countries started dramatically raising the price of oil to unprecedented levels, which had a significant effect on inflation during the 1970s.