Goof: Terri moves a box to to a table closer to the couch to put some record albums in it. She leaves it there and goes into her bedroom after telling Mr Furley she is moving to Hawaii. In the very next scene, the box is gone, but everything else is still on the table.
In the episode The Apartment, we see the apartment above Jack's Bistro is only one room with a small bedroom and a bathroom. However, when Vicky and Jack move into this apartment at the end of the episode, we see there is also a large living room, and the bedroom looks nothing like it did in that episode.
Mr. Furley: I'm the one who straightened him out, you know!....damn!
In the original airing, after the final scene between Jack, Vicky and Mrs. Bradford, the Three's Company logo is replaced by the logo for the spin-off series, Three's a Crowd before the end credits roll.
By the end of this series Jack is the only charactor to appear in every episode. Coming in second would be Janet who has only missed one episode.
This is a special two-part episode. It is the series finale of Three's Company and the pilot to Three's A Crowd. ABC made fans wait until September to see it.
Just like Man About the House, Three's Company lapsed into a spin-off Three's A Crowd, it's UK counterpart was Robin's Nest.
While they do explain why Janet's parents were not present at the wedding, we don't hear anything about Janet's Sister, we also don't hear anything about the Ropers, Lana, Chrissy or Cindy.
When Terry shuts off the lights in the final scene, it was done as a tribute to the Mary Tyler Moore Show.
After this episode Chrissy's husband tried to make a deal that Chrissy could marry Jack and live with him instead of Vicky for Three's A Crowd but it failed.