Jack Marshall

Jack Marshall, generally referred to as "Uncle Jack", is a fictional character featured in the original Land of the Lost television series. The character was introduced as a series regular with season three of the show, beginning with the season premiere, "After-Shock", replacing the character of Rick Marshall, played by Spencer Milligan, who had departed the series. The role of Jack Marshall was played by actor Ron Harper. As the replacement father figure on the show, he appeared in a total of thirteen episodes, including the series finale.