Ponch's old friend, Sid, is supposedly an old classmate. In reality, the actor portraying Sid is nine years older than Erik Estrada.
In the junkyard chase scene at the end of the show, after the guy causing the highway chaos drives into the yard, he starts to drive off, and Jon chases him, as Jon starts to ride, he goes by a stack of cars, and the unmistakable white stripe on a Ford Torino, possibly from Starsky & Hutch, can be very briefly seen as he rides by.
Kaz Garas played the part of Steve Trevor in the 1974 Wonder Woman TV movie. Robert Pine's son Chris Pine would later play the part of Steve Trevor in the 2017 Wonder Woman theatrical movie.