Based on the book/movie/Broadway musical, this incarnation of the story actually gets Yul Brynner in the title role. The King, that is. Samantha Eggar is Anna.
There are a few MASH connections pointed out by Harry and Wally's Favorite TV Shows: The two sitcoms share producer Gene Reynolds, and Brynner's daughter Serena is played here by Rosalind Chao, who later played Soon-Lee Klinger on the classic Korean War sitcom and its unclassic spinoff AfterMASH. By the way, harry and Wally say, "Compared to the hit movie, this TV version is pretty lame." It was gone after 13 episodes.
Here is what the 1972 Fall Preview of TV Guide says about the show: