The code used by Fritz to Jon after the first game is 10-10, which for the CHP means off duty.
Just after Ponch and Jon pull into the gas station, you can see an LAPD Matador in the background, making a left turn.
The date and time of the first crash according to Jon's report was 9-7-77 at 1400 or 2:00 PM. The air date was 9-22-77.
When arresting the tow truck driver, Ponch talks about the women he robbed and how they could have been his mother or sister. Both characters would make appearances later in the series, his mother Maria Poncherello in Rally 'Round the Bank (1979), and his sister Patti Poncherello in Breaking Point (1982).
Ponch's mailbox has his ID number of B600.