1974 Sid & Marty Krofft's Land of the Lost S01E04 Downstream

Land of the Lost TV Series 1974–1977 TV-G Land of the Lost (1974)
A family finds themselves fighting to survive in a land populated by dinosaurs and otherworldly beings.
Creators: Allan Foshko, Marty Krofft, Sid Krofft
S1.E4 Downstream Episode aired Sep 28, 1974
Walker Edmiston in Land of the Lost (1974)
The Marshalls attempt to escape the Land of the Lost by river and wind up trapped in a cave with a daffy Confederate miner.
Director: Dennis Steinmetz
Writers: Larry Niven, David Gerrold, Sid Krofft
Stars: Wesley Eure, Kathy Coleman, Dave Greenwood
Stars
Wesley EureKathy ColemanSpencer Milligan