Cigarette Smoking
Back in the ‘50s, cigarettes were not unusual at all. However, Lucas McCain was depicted smoking a cigarette only once on The Rifleman. Chuck Connors actually smoked 60 cigarettes each day, however. In 1992, he died of pneumonia and lung cancer at the age of 71.
The Plainsman
Lucas and Mark McCain had plenty of long conversations about morality and ethics. However, he had adult pals as well. One of them was a plainsman played by Michael Ansara. In fact, the character eventually became the star of a spin-off show called Law of the Plainsman!