Was that the school teacher? I think he married her in the finale. (The first girlfriend was the same actress as the oldest daughter on Father Knows Best)
Yes, Helen, the schoolteacher, was often on some feminist rant or other. Ellie, the pharmacist, was the daughter from Father Knows Best. I seem to recall Ellie running for mayor or something, and that was kind of a feminist episode. But she was sweeter and not as annoying as Helen.
His first girlfriend was a pharmacist, although I can’t remember her name on the show. She had previously played Betty on Father Knows Best.