Based on the 1970s British Sitcom "Man About the House" (1973).
Susan Lanier, who played Chrissy on the second unaired pilot, is seen on the show's ending for the first several seasons alongside Jack and Janet, where the three are tossing bread to seagulls at the beach. This ending was carried over from the pilot and wasn't re-shot with with Suzanne Somers as Chrissy.
During the earlier seasons' opening credits, the brunette walking by the beach that causes Jack to fall off his bike is Suzanne Somers
At the end of season three, Mr. Roper reveals that he sold the building, and the Ropers are moving. Mrs. Roper is hesitant. In real life, Audra Lindley was excited about doing a spin-off, while Norman Fell didn't want to leave Three's Company. It took him almost six months to agree.
Numerous guest actors and actresses appeared in multiple roles. Jeffrey Tambor was the leader with four.
Because of the season five controversy, the producers reduced Chrissy's role to short phone calls. Suzanne Somers would come in and record them the day before the rest of the cast arrived to shoot the episode. Many of the phone tags were later cut when the series went into syndication.
John Ritter is the only cast member to appear in every episode.
Although Jenilee Harrison was well liked by her co-workers, her inexperience and a drop in ratings led to them searching for yet another person to fill the third roommate position.
Two episodes from "The Ropers" (1979) were added to the 'Three's Company' syndication package. They include the Ropers pilot, and another episode that includes guest spots from John Ritter, 'Joyce Dewitt', and Suzanne S
During Suzanne's clash with the producers at the start of season five, the cast had to be given scripts with Chrissy, and without Chrissy in them. Most of the time, Chrissy's lines were given to Mr. Furley.
In the show's opening (beginning with the sixth season), a toddler walks up to Joyce DeWitt as she is feeding a goat. The toddler is Jason Ritter (son of John Ritter). This is revealed by DeWitt in a bonus feature of the Season 4 DVD.
Chrissy's full name is "Christmas Noelle Snow".
The 1980-1981 season was very difficult for the cast and crew. Suzanne Somers began to demand higher pay than her fellow cast members and part ownership of the show. When she was refused, she would often not show up to work. John Ritter and Joyce DeWitt refused to work with Somers any longer. So her character Chrissy was written out of the season except for a 60-second scene at the very end of the episodes. In these scenes, Chrissy was visiting her family and she would call Jack and Janet on the phone. These scenes were filmed early in the day so Somers would be off the set by the time Ritter and DeWitt arrived as they wanted no contact with her. At the end of the season, Somers was fired and Chrissy was never mentioned again.
The original unaired pilot was written by Larry Gelbart and directed by Burt Brinckerhoff. A second pilot was taped with Joyce DeWitt as Janet and Susan Lanier as Chrissy. 'Denise Galik-Furey' was originally cast as Chrissy but suddenly became unavailable shortly before taping. Bobbie Mitchell guest starred playing 'Patricia Crawford'.
Ralph Furley's brother, Bart, is mentioned several times throughout the series, but he is seen only in one episode ("Furley vs. Furley").