YMMV / Three's Company

  • Ear Worm: "Come and knock on our door..."
  • Fan-Preferred Couple: Many fans over the years have expressed disappointment that Jack and Janet didn't get together in the end.
  • Hollywood Dateless: A mild example. It's strange when Janet complains about not having a date for the evening. She dates frequently but doesn't have a steady boyfriend through most of the series.
  • Idiot Plot: See What an Idiot below, and also its tendency to make plots based off stuff from the Mistaken for Index.
  • Recycled Script: An early episode had the roommates trying to hide a recently adopted pet from Mr. Roper. Towards the end of the series' run, a similar plot (with a different animal, Mr. Furley and Terri) was used. John Ritter himself later acknowledged the trope and said that this was when he realized the series was starting to run out of ideas.
  • Replacement Scrappy: Cindy, Chrissy's cousin, was almost a carbon clone with considerably less jiggle factor and the added annoyance of being The Klutz. Terri managed to avoid this fate by actually having a brain.
  • Retroactive Recognition:
    • In addition to their work on Three's Company, developers and executive producers Don Nicholl, Michael Ross, and Bernie West are also best known as creators and executive producers of The Jeffersons.
    • David Mirkin wrote seven episodes. Mirkin is best known as co-creator and co-executive producer of Get a Life.
    • Roger Shulman and John Baskin wrote four episodes and served as producers. Both are best known as creators and executive producers of Crazy Like a Fox.
    • John Boni wrote three episodes. Boni is best known for co-creating When Things Were Rotten.
    • Neal Marlens wrote two episodes. Marlens is best known as creator and executive producer of Growing Pains and co-creator and co-executive producer of The Wonder Years and Ellen.
    • Joyce Burditt wrote an episode. Burditt is best known for co-creating Diagnosis: Murder.
    • Howard Gewirtz also wrote an episode. Gewirtz is best known as creator and executive producer of Oliver Beene.
    • Mark Fink also wrote an episode. Fink is best known as co-creator and executive producer of Hang Time.
    • Prudence Fraser and Robert Sternin also wrote an episode. Both are best known as creators and executive producers of The Charmings and developers and executive producers of The Nanny.
  • Tear Jerker: Mr. Furley recounting how he once had a pet as a kid, but it was hit by a car and died, he then decides to name the cat he found after it.
  • Values Dissonance: The gay jokes on the show are a little hard to watch through a modern lens.
  • What an Idiot: This will apply to at least one character Once an Episode.
  • What Happened to the Mouse? : Mrs. Roper has a parakeet in the first season, and the gang gives her a puppy that Larry has manipulated them into taking. No mention is made of the pup after that episode, although it's a fair assumption she still has the parakeet.

http://tvtropes.org/pmwiki/pmwiki.php/YMMV/ThreesCompany