It was not only that Karl Malden and Michael Douglas had good chemistry for four out of five seasons, they did. But it was a friendly generational rivalry in looks and style.
Back in the 40s and 50s on the big screen and small detectives all looked like Karl Malden with the button down shirts and the obligatory fedora. But in 1972 when The Streets Of San Francisco made its debut Malden was dinosaur from another era. So without one big of dialog set you had a generation gap the second Michael Douglas in a hip outfit for the Seventies or as hip as a police force allows you to be.
But there was no conflict, an occasional disagreement as the older cop taught the younger one. But it wasn't that Malden was always right. Occasionally Douglas taught Malden a thing or two about reaching the younger generation when it was necessary to solve a case.
Douglas left the show in 1976 and Richard Hatch became Malden's new partner. But they never quite got it together as a team the way Malden did with Douglas.
I liked the show, I liked the stories. But most of all Malden and Douglas were a joy to watch.