From CHiPs Online:
Officer Bruce Nelson and Ponch are out and spot a stolen car within Bruce's first hour as an officer. When they try to chase it, it ends up in an accident. At the briefing, we learn that that Bobby Nelson is now Kathy's partner. After the briefing, Bobby gives Bruce his lucky horseshoe keychain.
Ponch and Bruce go 75 miles south to Lone Canyon to follow up on the auto theft. Meanwhile, Captain Burke drops his grandson off at Central for Sarge to babysit. At 11:30am, Ponch and Bruce find out their suspect died a few days ago. While getting ready to leave, they notice the "Zodiac twins", witnesses to a drug-related murder.
While in the diner/general store, the local Sheriff claims he has a warrant for the twins. When he doesn't get them, he impounds Ponch and Bruce's motors. Meanwhile, Sarge pawns Captain Burke's grandson off on Harlan.
When Bobby and Kathy find nothing in Juniper, they head for Lone Canyon. Meanwhile, the Sheriff shoots tear gas into the general store. Ponch and Bruce escape in an old truck. The Sheriff and his posse chase the truck...but wait! Ponch is just carrying manequins!
Bruce and the twins free the CHP motors while Ponch leads the Sheriff away. Ponch gets on Bruce's motor while a jeep rams the truck and then it explodes. Bruce and Ponch head back to pick up the twins and leave Lone Canyon. Bruce wants to stop when he sees a construction crew, but Ponch knows it's a trap. They start driving cross-country to get away from their guns. While Bruce fixes his broken chain, Bobby and Kathy enter Lone Canyon.
Meanwhile, Harlan pawns off the Captain's little brat off on Grossie. Back in Lone Canyon, Ponch discovers that the Sheriff is in on the drug dealing Bruce finally fixes his chain by using the lucky horseshoe keychain. When Ponch and Bruce are on the home stretch, a plane starts buzzing them. When Ponch and Bruce drive under some telephone wires, the plane's engine stops and crash lands.
Ponch arrests the Sheriff who was piloting the plane. Meanwhile, Grossie turned little Billy over to Webster...who hasn't been seen since. Sarge finds Webster tied up in his locker. The Zodiac Twins (Jeannie and Jan) agree to testify. Bruce tells Ponch he likes helping people. Ponch informs him, "it's only the beginning." (Yeah, right Ponch...two episodes left.)