It's interesting how flat the Brady Kids' performances come off here. They were apparently never given much direction in the recording studio. "Just read what's on the page," is supposedly what they were told. The director never bothered telling them about the story or scenes. Why? Apparently the kids' schedules were so packed that there simply wasn't the time!
The eldest three Brady actors got into some contract disputes prior to the brief second season, leaving Filmation to cast three other actors in their roles (two of whom were Lou Scheimer's kids).
Unsurprisingly, a lot of the animation was reused from earlier Filmation cartoons, particularly
The Archies.
Sherwood Schwartz wasn't completely thrilled with the series, as he felt Filmation made it too similar to the live-action
Brady Bunch. He felt the same way about
The New Adventures of Gilligan (though he loved
Gilligan's Planet).
A Very Brady Sequel did a nice tribute/parody to the cartoon during a scene involving some mushrooms...
The Brady Kids debuted on
ABC's Saturday Superstar Movie, a movie-of-the-week concept for the Saturday morning crowd. Other live-action series to find their way onto SSM were
Nanny and the Professor,
Lassie, Gidget,
Bewitched, Love American Style, That Girl, Lost in Space, and
The Munsters. Even
The Banana Splits got the cartoon treatment.
(Slighty OT, but some of these 'movies' were pretty creative.
The Man Who Hated Laughter featured an all-star cast of Kings Syndicate comic strip characters, from Popeye to Flash Gordon.
While I haven't seen it in full, I know Looney Tunes fans aren't too thrilled with
Daffy Duck and Porky Pig Meet the Groovy Goolies. Many of these are on YouTube now, for those curious.)
http://en.wikipedia.org/wiki/The_ABC_Saturday_Superstar_Movie