The opening credits of The Brady Bunch are as iconic as it gets in classic TV history. It's been parodied over and over again, and if you were a fan of the show, you likely loved how nearly every season updated the sequence, so you could watch the kids grow up (and Mike's hair 'fro out!) in those little boxes that signified the beginning of the idyllic family sitcom.

Watching the opening credits from season to season, you'll notice small changes. Cindy's ribbons change colors. Bobby's shirts shift in styles. Peter's hair gets a little wild. But we were watching closely going season to season when we noticed that there's something a little off about the final season's opening credits sequence, and it all has to do with Marcia, Marcia, Marcia, of course.

Marcia's square is located in the upper left corner, and for the first four seasons, if you watch the opening sequence, Maureen McCormick played the role with all smiles, looking down and to the corner at all her younger siblings, and occasionally glancing over at Carol. She's cute as a button any time her face lights up, so it was a little distracting when we got to the fifth season opening credits and noticed a slight shift in attitude in Carol's oldest daughter.

See Also

Are these the names of The Brady Bunch episodes or Herman's Hermits songs?

Watch the opening credits of any fifth season episode and you'll see what we mean. There's a good long moment where Marcia's eyes seem to go a little vacant, as she stares off into space, rather than glancing around at her fellow castmates. The sides of her face usually pushing her cheeks up into a great big grin go a little slack, and the corners of her mouth even slightly downturn. It makes us wonder: What was Marcia really thinking?

Of course, Marcia as a character is known to be a little spacy every now and again, especially when she has a crush, so perhaps this little blip is meant to be entirely in character. Your guess is as good as ours, but for now, scroll through the animated GIFs below to watch Marcia kinda lose a little steam in the last season's opening credits for The Brady Bunch.