Character mistake: While they're dancing and practising in the garage Marsha says "come on Chris", when she should have said Peter.
How to Succeed in Business? - S4-E19
Plot hole: At one point Peter admits to Greg he was fired. In a later scene, Peter tries to talk the parents out of going to the bike shop (where they think Peter still works), and soon after the parents ride new bikes and see Peter in the park and admit to him that his boss told them what happened. Carol said that Greg filled them in as well. This is incorrect because before leaving the house, they didn't know of the firing, and went straight from the bike shop to the park. Greg never told them.
Suggested correction: Just because we didn't see it on camera doesn't mean it didn't happen, it's known as "implied action."
That's not really the case here... the sequence of events explain it all. It went from going to the bike shop to find out what happened to the park. Even if they went home in-between, there would still not be a reason to have to question Greg, since they know what has happened at this point.
To build on the implied action point that the user stated, we do not know what happened off-screen so it's not impossible to believe that Mike and Carol went home after learning about what happened from the boss to talk to Peter and then have Greg explain where he may be and why. Peter did tell Greg about feeding the pigeons in the park so it tracks.
The Great Earring Caper - S4-E20
Visible crew/equipment: The stage lights are reflected in Peter's magnifying glass. (00:04:00)
The Great Earring Caper - S4-E20
Continuity mistake: During the kids' ping pong game in the backyard, there is something white near Jan's feet that appears to be a spare ball. But in the very next shot, it's gone. (00:12:40)
Audio problem: Alice's comment to the girls while handing them their books was obviously dubbed; there's an unusual echo quality in the sound. (00:03:05)
You Can't Win 'Em All - S4-E22
Continuity mistake: At the start, when Cindy walks into the kitchen she sets her books down on the counter with the book's binding facing the sink, but in the closeup the book's binding now faces the opposite way, toward the stove. Additionally, the grocery bag which was on the counter right beside Carol, has been moved for the closeup so Carol is in full view, but the bag is now at the very edge of the counter near the stove, which is pretty odd since there's not enough counter there to actually hold the full grocery bag (presumably something else supported the bag off camera). (00:01:30)
You Can't Win 'Em All - S4-E22
Continuity mistake: The dress in Cindy's arms turns around from one shot to the next; first the back is facing outward, then the front is. (00:14:15)
You Can't Win 'Em All - S4-E22
Continuity mistake: What appears to be a carton of eggs is sticking out of one of the grocery bags in some shots, but not in others. (00:15:00)
You Can't Win 'Em All - S4-E22
Revealing mistake: When Cindy and her parents get home after the television show, just as Carol and Mike walk down the steps the set's unfinished wood can be seen at the edge of the steps, at the bottom right corner of the screen. (00:22:40)
Continuity mistake: In "Our Son, the Man", Greg wants his own room. One night, while in bed, Mike and Carol discuss their options. Carol says, "How about the attic?" Mike responds with, "That would be fine if Greg were only two and a half feet tall." Later, they give Greg the den for a while. However, in "A Room at the Top", after cleaning out the attic, which was now full size, both Greg and Marcia want it for their own private room.
Continuity mistake: In episode 5-8 the girls have their walls wallpapered from pink to a yellow pattern with a white background. In the next episode it is back to the pink walls. The following episode it is back to the new wallpaper.
Continuity mistake: When Cindy gets out of bed to write a letter to Joe Namath, they show the wall next to Jan's bed and there is no window. In a previous episode Jan lost the locket out that window that Alice sent her.
Snow White and the Seven Bradys - S5-E3
Continuity mistake: During the play, Mike's "Prince Charming" hat disappears and then reappears when he leans over to kiss Carol. (00:22:15)
Snow White and the Seven Bradys - S5-E3
Continuity mistake: When Mike rides up on stage he points to the damsel in distress with his right arm extended, but in the closeup it's his left arm extended.
Snow White and the Seven Bradys - S5-E3
Audio problem: When the kids are painting a cardboard tree for the play, they ask their dad what he thinks of it. He then says "you better ask the two poodles next door." As he walks away he seems to almost trip/fall over something. Then the mom is heard laughing, even though she's not in the scene.
Visible crew/equipment: When they're all practicing the Charleston, while Bobby's watching from the stairs, everyone is shown dancing from different angles, and in the low angle shots facing the kitchen the top of the kitchen set is visible, particularly when Carol twirls her necklace.
Continuity mistake: During the goat in the master bedroom scene, the flowers on Carol's side of the bed change during the scene. At first there is a pink flower to the right of a white flower, and then it changes to white flower on right of the pink one. In addition, the whole bouquet looks slightly different in different shots.
Continuity mistake: Near the beginning, Greg is painting the shutter green, he gets a phone call and goes inside. The paint bucket falls on Bobby because the ladder falls. Greg sticks his head out the window and asks who took his ladder. The shutter now has no paint on it.
Other mistake: When the boys are playing football in the backyard, watch Greg's right foot - at one point he slips on the Astroturf lawn, causing it to wrinkle and exposing a seam on the "grass" lawn. (00:03:20)
Suggested correction: At no time in the show did they affirm the grass in the backyard is real. Many houses, particularly out west where the show takes place, have artificial grass as it's often easier than caring for real grass which tends to dry up easily out west or not grow at all in some areas. Even in A Very Brady Renovation they made sure to use artificial grass for the backyard.
The grass is supposed to be real. There are several episodes where they are mowing the lawn.
But the renovation show was in 2019. In the early 70s artificial grass was only starting to be adopted in sports stadiums. Not used in homes until many years later.
Continuity mistake: In the kitchen when Jan announces that she took up tap dancing, Mike's first button goes from buttoned to unbuttoned a few times during the scene. (00:06:00)