Richard Kimble is working at the Evergreen Fish Hatchery in Wisconsin. He has a run-in with the local sheriff, who becomes suspicious and finds out who Kimble is. While on a road trip with his son, Lt. Gerard is notified. When he and the sheriff go to apprehend Kimble, Phil Jr. hides in the back seat of the car so he can watch the takedown. However, Kimble outsmarts them and takes the sheriff's car, with Phil still hiding in the back of the station wagon. Kimble and Phil Jr. end up camping in the mountains all day and night. Phil Jr. keeps leaving clues for his dad to pick up his trail.
It's really a fine episode. A 13-year old Kurt Russell is great as Phil Jr. He believes Kimble is guilty because that's what his dad has told him. And he spends a lot of effort trying to help his dad catch Kimble. But in spite of it all, he grows to like Kimble. It's a common theme. Kimble's innate goodness draws people to him. Phil Jr. and Richard Kimble are on opposite sides, but Kimble stops to heat up canned soup for Phil, he stays with him when Phil says he's scared of the dark, he helps Phil when Phil steps on a trap, and every time Kimble catches him trying something new, Kimble doesn't get angry at him. Phil is his dad's son, and he does spend all his time thinking up ways to capture Kimble, but he also recognizes that Kimble is a good person.
This episode features really, really good interactions between David Janssen and Kurt Russell. They're great together.