Over the course of the series, how long the Loudons had been married kept changing. In an early episode in 1982 they'd been married 16 years; in a 1984 show it was said to be 1 years; when the Loudons are going to renew their vows in 1986, it was said to be 15 years.
I can't help it, I like that boy.
The interior and exterior of the Stratford Inn are inconsistent with each other. There is a window to the left of the main door that would be obscured by the interior stairway, and the rooms that line the upper hallway would open onto the roof of the front porch. Also, there is a corridor that leads to the left at the top of the stairs that are supposed to give access to further rooms. This corridor would also open on the roof.
After the credits The MTM kitten lip-syncs Bob Newhart's understated "Meow".
In episode #6, "No Tigers at the Circus," Dick is seen watching a TV show, and only the theme song is heard. In the original run, it was the theme from "Mister Ed" (1961), but in reruns it was changed to the theme from "Bob Newhart Show, The" (1972).