Continuity mistake: A bottle of ketchup on the lazy Susan (beside the shorter bottle of chili sauce) keeps appearing and disappearing between shots, prior to the dinner starting. (00:51:45)
Continuity mistake: In their first night at the new house the Beardsley's lose power completely. When the doctor arrives (Tom Bosley) he rings the electric doorbell.
Suggested correction: We have had the power go out at our house before and the doorbell still worked.
Continuity mistake: When Helen and Frank are out on their first date, Helen loses her slip in the bar and Frank retrieves it. After that, Helen's slip mysteriously disappears because she is obviously not wearing it (since the girls cut her dress, she would've had to have pinned it back up or else it would be visible). Also, Helen's purse is too small to stuff it into and Frank didn't bring anything to carry it in.
Continuity mistake: When Helen and Frank are walking home after their first date you can see that they are surrounded by people. When the shot changes all the people have disappeared and Helen and Frank are almost completely alone.
Continuity mistake: Envelopes to Helen are shown with an address of 1034. But in scenes showing the front door, the address is 346.
Continuity mistake: When they all first move into the new house after the wedding, they are scrambling to get settled into their rooms when the lights go out. Helen and Frank hand out candles and Helen asks Greg to take some downstairs. After he heads downstairs, a voice is heard remarking, "Where's 6-blue-B?" According to Frank's chart, Greg is 6-blue-B. Also, the voice-over begins just before the shot switches off of Greg heading downstairs.
Continuity mistake: When the doctor examines Phillip (the first night the whole family is in the new house) he wipes and puts away his thermometer, then does the same motions again.
Continuity mistake: In the scene where Frank brings Helen home to meet his kids, he asks Mike to fix them a drink. He does, but only fills Frank's glass halfway. When Rusty takes the drinks to them, the glass is full.
Continuity mistake: When Helen and Frank go to the bar on their first date, Helen asks Frank to get her some cigarettes. Frank returns with six packs of cigarettes, three in each hand. Helen then claims that she doesn't smoke, and Frank puts all six packs into one hand to accept a drink. When we next see Frank's hand he has three packs of cigarettes. Finally, the cigarettes disappear completely.The cigarettes couldn't have fallen on the floor because we see the floor in different shots. And, as Helen and Frank are standing in the middle of the bar, surrounded by people, Frank has no place to put the cigarettes.
Continuity mistake: Scenes showing the newborn until the end switch blanket colors back and forth from blue to pink.
Continuity mistake: When Frank brings Helen to his house to meet his children there jam smudged on the front window and it changes in between shots.
Continuity mistake: Van Johnson has jam and ink rubbed on his uniform by the children, but those stains are completely gone in the next scene when he accompanies Henry Fonda and the daughter to the dispensary.
Continuity mistake: When Frank's brother and sister-in-law leave the house with Germaine and Joan, they are shown (in a mirror) walking out the front door, which has a picture on the wall to the right of the door (left side of the mirror). The wall is flush with the door; however, in a later scene (one of the housekeepers walking out the door), the wall (with the same picture) is perpendicular to the door.
