Cliff Robertson stars in this episode about families traveling West in search of California. His son is sick and almost dead, so he climbs a hill in search of something to help save his son, but finds something else entirely. He finds the future.
In a small roadside diner he gets a prescription (which just so happens to save his son), and as the owners are calling the police, he runs back across the rim and into the past.
As it turns out, his son lives and becomes a doctor, specializing in children’s illnesses. Just the sort of special twist you come to expect from the show.
The owners are mystified that he just disappears, and his rifle, found in the desert where he vanished, looks like it’s been there for 100 years, when it looked new while he held it in his hands inside the diner.