Cahill is critically injured in a multi-vehicle pile-up that claims eleven lives. Ponch and Jon are tapped to serve on the Multidisciplinary Accident Investigation Team determined to pinpoint the cause and to clear Cahill from blame.
Ponch and Jon put away their bikes and play a diplomat and his chauffeur when they go undercover to prevent a wealthy man and his beautiful granddaughter from falling victim to a violent extortion racket.
Ponch reconnects with Robbie, whose trucking business is at the mercy of a competitor trying to put her out of business. Meanwhile, Officer Cahill is tracking everyone's biorhythms to see if it affects their performance on the job.
While Ponch and Jon are off in Sacramento attending a seminar, Grossman starts to collect anecdotes about the team from other officers so that - win or lose - they can give them a party, half testimonial and half roast.
Ponch and Jon continue pursuing the roller skating smash and grab thieves. Jon helps a famous musician who is exhausted and disillusioned. Meanwhile, Ponch is running out of time to find celebrities for the CHP Skate with the Stars charity.
Ponch and Jon are chasing someone who looks like the daredevil motorcyclist, Roy Yarnell, whom they encountered last year. Ponch is injured. Jon goes to see Roy, but he claims it's not him. That's when Jon asks Getraer to let him use the Supercycle which they used to catch Roy last time.
Due to a police strike, Getraer asks Ponch and Jon to work in Palma Vista. There they meet a beautiful female race car driver, Candi Wright. She finds a traumatized little girl at a fire who won't tell them who she is or where she's from.
The new watch commander visits Central and begins hassling everyone for violating minor regulations. Even Getraer does not agree with the reprimands. The CHP is looking for thieves stealing trucks from loading docks.
Ponch and Jon are after jewelry thieves who use stolen motorcycles for quick getaways. The CHP holds a fun fair for kids in physical therapy. Ponch attempts to befriend a girl paralyzed after the thief hit her bicycle.
The Christmas season doesn't mean any less work for Jon and Ponch. At the community church, thieves run off with a 15th century bell that means a great deal to the local kids. The thieves also operate a car-theft ring and prey on unsuspecting car sellers by taking the cars for a test drive and not returning. When the criminals get into an auto accident, their strange behavior gives them away and they are arrested.