Trivia: Although many realistic freeway numbers and exits mentioned over the 2-way radio are real, they were not used in the show. An unused section of the 210 freeway (close to the 118 freeway) in the San Fernando Valley that wasn't quite open to the public yet, was the location nearly always shown on the show representing whatever location is mentioned. If you see many episodes, you can see the same section of freeway always shown.
Private Madness, Public Danger - S1-E1
Trivia: This, the first ever episode of the series, was first broadcast on ITV on December 30th 1977. It was repeated on ITV in 1979. Some time after this, a cut was made, which has endured on all subsequent UK TV transmissions: Just prior to the title sequence, we see Nesbitt hand Susan some drugs. In the original broadcast we then see Susan tightening her belt around her arm. Using Nesbitt's cigarette lighter to sterilise a needle, she then "shoots up" (injects the drugs in her arm). The excision may have come about because of a tightening up of censorship rules by the Independent Broadcasting Authority about the explicit use of illegal drugs on TV. However, the missing segment has been restored for the 2002 DVD release.