Observant viewers would have noticed that, during the exterior shots of the apartment, the numbers on the building kept changing. This is because the area where the show was filmed had three different addresses during the show’s duration.
Funnily enough, the apartment complex name (Hacienda Palms) remained the same throughout the entire series.
The Show Had at Least One Famous Fan
Accolades from those already in show business say a lot about the success of a show. Lucille Ball was apparently a big "Three’s Company" fan and even hosted a “best of Three’s Company” show.
Actor Jim Parsons (of "The Big Bang Theory") is also said to be a fan.
There Were a Bunch of Continuity Errors
Unfortunately, it can be easy, with all the busyness of a film set, for show creators to miss important things. There were actually a number of continuity errors on the show, one of which, was pretty significant.
In one scene, Jack has leaves all over him that appear to change color when the camera cuts back to him. There were some other sloppy mistakes such as items on set disappearing between takes.
Jack Lived At a Well-known Location Before He Moved In
Before Jack crashed with Chrissy and Janet, his character’s life story had a bit of a rough patch.
Jack was actually staying at the Y.M.C.A. before he found a new home with the girls at Hacienda Palms.
Jack and Larry Weren’t “Young Guys” On The Show
Though the series was supposed to feature twenty-somethings navigating everyday life, John Ritter was actually in his early thirties when he was on the show and Richard Kline was over forty!
Thankfully, the age inaccuracies didn’t seem to affect the engagement of the audience.