- It was the first network sitcom centered around a single working girl who was not a maid. Previously, woman who were sitcom stars tended to be a.) wacky housewives (see I Love Lucy), b.) family matriarchs (see The Donna Reed Show) or 3.) domestics (see Hazel). TV historians say her show paved the way for The Mary Tyler Moore Show just a few years later.
- Donald Hollinger was originally supposed to be Ann Marie’s agent as well as her boyfriend. After they filmed the series’ pilot, producers must have decided that agents can sometimes be a little sleazy. So Donald changed jobs and became a magazine writer. (He was played by Ted Bessell in that never-broadcast pilot and the subsequent series.)
- There was a connection between That Girl and The Dick Van Dyke Show. The Van Dyke show was produced by Marlo’s father, Danny Thomas and two of the show’s main writers, Bill Persky and Sam Denoff, became the creators of That Girl.
- Marlo Thomas came up with the show’s concept. She was the one who insisted that her character be a small-town girl who comes to the big city to try and find work as an actress. (Although her real life was that of the daughter of a rich, famous comedian, which made her entrance into show business much easier.)
- Her first next door neighbor was also a Broadway leading lady. Bonnie Scott who played her original next door neighbor, Judy Bessemer, starred on Broadway opposite Robert Morse in the hit musical How to Succeed in Business Without Really Trying. Bonnie left the series because the shooting schedule took too much time away from her young kids.
- Ruth Buzzi and George Carlin made appearances on the show. Ruth played a neighbor of Ann’s in several episodes while Carlin played her agent (replacing Ronnie Schell) in just one episode.
- Marlo wanted to call the show Miss Independence. That was the nickname her father had given her as a young girl.
- The network wanted the series finale to be the wedding of Ann Marie and Donald. But Marlo Thomas thought that might send the wrong message to the single girls she felt were the series’ core audience. You know, she gets married and “they live happily ever after.” So, she and Donald did get engaged during the show’s fifth season, but the series ended with Ann Marie still single.
Finally, is there any human being who watched the show and thought Ann could really be a virgin living in New York City in the mid 1960’s, especially if she was working in show business?
Didn’t think so.