S01E01 Pilot
I have been unable to trace details of this 90-minute TV-movie pilot. The International Movie Database identifies the writer as Tom Greene.
Pete's wartime buddy Dan Marshall undertakes daring exploits in a huge, dark, and treacherous cave, with an admiring John Karras following close behind.
Three for the Road is an American drama television series that aired on CBS from September 14 to November 30, 1975. The series centers on Pete Karras, played by Alex Rocco, a recently widowed photojournalist travelling around the United States with two sons, John and Endy, in a recreational vehicle.