Gear up for more '70s-era action-packed adventures with Erik Estrada and Larry Wilcox as TV's favorite California Highway Patrol officers Frank "Ponch" Poncharello and Jon Baker in season four of CHiPs. Among the action this season is a special two-part episode where the two friends and motorcycle cops have to deal with a gigantic boulder that threatens the homes and highway below it, as a celebrity bicycle rally and fundraiser goes on. Plus, crop vandalism, theft of construction equipment, kidnapping of one of their fellow officers, a neighborhood crime watch group that spawns a vigilante movement and the possibility that the California coast is fertile territory for a smuggling ring. Also starring Robert Pine, Paul Linke, Brodie Greer, Lou Wagner and Randi Oakes, season four features guest stars Sonny Bono and Larry Storch (F Troop), among others.