The pool area used in this episode for Florida is the same set used in episode 39, "We're in for a Bad Spell" when Darrin must push Adam Newlarkin into the pool.
During the diving in the pool scene, Samantha must twitch the "Fun Darrin" back out of the pool, because he doesn't know how to swim. In season seven however, Endora zaps up a pool into the backyard offscreen (where Darrin is standing) and he is fine.
The title alludes to a phrase from the American revolutionary war song, The Liberty Song: "United we stand, divided we fall." The phrase seems to go as far back as Aesop and is also the state motto of Kentucky.