Producers really struggled to find a replacement for Somer’s character. After the departure of Chrissy, she was replaced by Cindy, and after Cindy was written out of the show, she was replaced by Terri (played by Priscilla Barnes).
According to Barnes, she said the producers didn’t want her because her hair was dyed “too blonde”. What’s a girl to do?
You Can See Boom Mics and Other Equipment In Multiple Episodes
Though "Three's Company" was a professional production, it did have a rather surprising on-set slip-up.
In fact, in multiple episodes, you're likely to catch a glimpse of a stray boom mic or crew member's hand falling into the shot. Hey, it happens to the best of them!
Jack Tripper Got His Own Spin-off.
After the end of "Three's Company," there was yet another spin-off attempt by the producers of the show. ABC then attempted to launch the show, "Three's a Crowd."
The plot centered around Jack Tripper moving in with his new girlfriend but (maybe because it was too similar to "Three’s Company") this spin-off fizzled out as well.
The Main Cast Didn’t Meet Until The Night of The First Taping.
Even though the plot centers around three roommates, the three cast members didn’t actually meet until the night of the first taping. This was partly because Suzanne Somers was such a last-minute addition to the cast.
But the three actors proved their talents by creating collective, on-screen chemistry for the show.
Jack Tripper is The Only Character to Appear in Every Episode.
Even though the show had three stars, John Ritter was clearly number one (for both the writers and the producers apparently).
His character, Jack, was the only one to appear in every episode of the show. That might explain his big salary!