Following Suit
It took a little while, but the concept of a single parent raising a kid caught on. One more show that had a single dad was the ‘50s show called Bachelor Father. During the ‘60s and ‘70s, there was also Julia. Played by Diahann Carroll, Julia was a nurse with a young son like Mark McCain.
Bye Sam
Sam Peckinpah was raised on a ranch, so he was qualified to write stories for The Rifleman. He was allegedly excited to keep the scripts coming, although he ended up leaving the show after the first season. He ended up making the move to film. Some of his works are Straw Dogs and The Wild Bunch.