Lou claims that Mary applied for the job of associate producer at WJM (back in episode # 1) eventhough she wasn't qualified. NOT TRUE: Mary applied for a secretarial position, which was already filled. Lou offered Mary the associate producer job (at a LESSER PAY). Surprisingly, Mary doesn't dispute Lou's recollection of what "really happened". One of the VERY few continuity flaws of the show.
There was also a whole episode built around Mary staying home sick from work. Sue Ann comes over and makes her "good" food ("no pizza") which she quickly takes from Rhoda
Mary was also fired from her job for a brief period in a season four episode.
In this episode, when asked how long she's worked at WJM, Mary responds, "7 years, never absent, never late." But she has been both of those a few times over the series; for example, in "Assistant Wanted, Female", Mary is one hour late due to Phyllis. She is also late in the episode "Where There's Smoke, There's Rhoda from season 2. Rhoda's apartment catches fire and her and Mary end up being late for work.
In the first few seconds of the last scene that of the episode -- the one that takes place in Sue Ann's bedroom -- the camera is aimed too high. One can see where the wall ends and the black ceiling of the stage-set begins -- complete with stage lights in full view!
In the previous episode, the last episode of Season 6, Ted and Georgette adopted a boy and announced they were pregnant. In this episode, Georgette is suddenly 9 months pregnant and no mention is made of their adopted son.
Murray is prompted to tell the station owner off after "Hooray for Captain Spaulding" gets cut out of a telecast of "Animal Crackers". However,"Animal Crackers" could not be shown in the U.S. from 1957 to 1974 due to a copyright dispute and since then has only aired on cable tv except for a network airing in 1979.
It is revealed that the credo of a clown was little song, a little dance, a little seltzer down your pants.
"Chuckles Bites the Dust" was chosen by TV Guide and Nick at Night/ TV Land as the greatest TV episode of all time (as of 6/25/97) for ANY series.
After 5 years of living at 119 North Weatherly, Mary moves into a new apartment.
Ted Konopka is listed as a guest star providing the sound effects of "Mrs. Goldman's Dog". Ted Konopka is none other than Ted Knight ("Ted Baxter"), using his birth name.
Continuity Goof: In this episode, Ted tells his absentee father that he had to learn about sex "on the streets", whereas in the season 2 episode "The Birds... and... um... Bees" Ted told Murray that he found out about it by reading a book called God's Little Acre.
Continuity Goof: In the season 1 episode "Anchorman Overboard," Ted indicates that his mother and father were the first to leave when giving a speech to a women's club. In this episode we learn that Ted's father deserted him when he was a boy.
When the Grant's home is first shown, there is no snow visible anywhere. Minutes later when Edie opens the front door, there is snow piled outside.
Liberty Williams later co-starred with Ed Asner in the movie "Gus".
Looks like for once WJM was ahead of its times. Lou's "rotten" idea of situating a cameraman in the backseat of a patrolcar in order to film on-the-spot arrests sounds exactly like the show that 13 years later in 1986 would become the FOX network's first hit COPS.
The "brand new" green Mustang convertible that Mary ogles in the dealer showroom while her own car is being repaired has a dent in the rear quarter panel.
"Put on a Happy Face" is the only episode of the series that did not end with the traditional "meow" of the orange MTM tabby Mimsey. Instead, Moore herself appeared in the circular MTM logo doing her best Porky Pig impersonation: "Th-Th-Th-That's all folks!"