T. J. Hooker - Season 2 Episode 10 Thieves' Highway

Hooker and Romano get caught up in the dispute between an independent trucker and the ruthless wholesaler who is sabotaging the trucker's operations. Against the wishes of his superiors, Hooker insists that he intervene in the situation before the truckers tire against the lack of action taken against the saboteurs, and become vigilantes to deal with things themselves. A new female Police commissioner who doesn't agree with Hooker's methods does not exactly help matters.