This is another episode in Mary's revolving door of handsome men. A handsome architect shows up at her door and wants to sketch her apartment for a book he is writing. They hit it off right away. It's interesting how many people just walk into her place. Anyway, they begin dating and while they have a nice time, he is really closed up. There is also a kicker. He is divorced and has a son. But it turns out that the son is 24 years old. For Mary, she suddenly realizes that this isn't so unusual if you're thirty and meet a person a few years older. It leads to some interesting developments. One is that the young guy is a Junior, same name as Dad. So when Ted Baxter meets him, he thinks he is the guy dating Mary. It's pretty funny.