The ABC era (Seasons 1-3)

https://i.pinimg.com/236x/16/a0/d3/16a0d33c58c165500c351150e8a38a14--s-tv-shows-life-tv.jpg

The first-run syndicated era (Seasons 4-5)

https://i.pinimg.com/originals/fa/8f/f1/fa8ff1e80f0112f9d490a27a6f165c73.jpg

or

The Ted Knight Show (retroactively Season 6 of Too Close for Comfort (https://web.archive.org/web/20061031125202/http://www.jumptheshark.com/t/toocloseforcomfort.htm) after Ted Knight's untimely death)

https://i.ebayimg.com/images/g/ygcAAOSwO-hcSWyA/s-l400.jpg

The first 5 seasons were good.

I recently streamed a portion of season 6 from Tubi and it just wasn't the same. Poor Ted looked so gaunt and the entire premise of the show changed without the girls.

Long time tv producer Arne Sultan who also produced shows such as "Get Smart" got sick and passed before Ted. He was also a big loss during that final season.