Dr.Brackett's car is a 1975 Cadillac Coupe De Ville. The first car seen on this show with 3 point safety belts. The death of the other driver could have been prevented by this device. It was in the mid 1970's that they started to appear in American vehicles. More expensive cars like the Caddy always had the latest features. It also had dual front airbags available as an option that year.
The actual address of the spot where the squad breaks down is 2801 W Magnolia Blvd in Burbank, Ca. As of 2015, An office supply store now occupies the once empty lot where the officer had the heart issue. The hamburger stand is now a dentist's office. Only the church seen behind Roy's head at the stand is still unchanged 40 years later.
Robert Fuller (Dr. Bracket) has called this one of his favorite episodes as it humanizes his character.
At least Twentieth time Dispatcher is seen & heard. Video is likely stock footage with audio to match the call.
When DeSoto is putting cardiac leads on officer with heart attack, you can see the previous lead sticker on the officer's lower left chest.