The show aired on CBS from 1972 to 1981, spanning nine seasons and 221 episodes (viaIMDb).

But the pair’s chemistry extended beyond filming hours.

Ultimately, rather than becoming involved romantically, the pair forged a strong friendship.

Michael Learned smiling

Less than a decade later, the Spencers evolved into the Waltons.

By the early 1970s, they had become TV’s favorite wholesome family (viaEntertainment Weekly).

Pa, John-Boy, and Ma from The Waltons

The Waltons cast