Air date: 9/25/70

Greg's ego runs amok after a compliment from Los Angeles Dodgers baseball team pitcher Don Drysdale, so much so that the eldest Brady boy vows to dedicate his whole being to the sport. Mike decides to re-invite Drysdale over to talk about the drawbacks of life on the road, making sure Greg overhears the conversation; but it only convinces him more that he's the next big thing. It takes a 12-run shelling in his Pony League game to knock Greg tearfully back into reality.

The Babysitters

Air date: 10/2/70

After convincing their parents that they're old enough and that they're responsible enough to serve as babysitters, Carol and Mike finally agree to leave Greg and Marcia in charge of their younger siblings for the very first time while they attempt to enjoy a nice evening out, and while Alice helps Sam redecorate his apartment. Before Carol, Mike, and Alice leave Greg and Marcia in charge, Cindy comes down with the sniffles and is sent to bed for the evening. When Carol, Mike, and Alice become concerned about Cindy and are unable to call home to find out how she's feeling, particularly as Jan was on the phone all that time with her ever talkative friend Gloria, they all head home to check up on the kids. Carol, Mike, and Alice all end up being questioned by police as prowlers after Greg called the police to report suspicious noises.

The Slumber Caper

Air date: 10/9/70

Marcia hosts a slumber party in the Bradys' home, but it could all be on permanent hold when she is accused by the school principal Mr. J. P. Randolph of drawing a very unflattering picture of her English teacher Mrs. Denton. After hearing Marcia's side of the story, Mike and Carol decide to stand behind their daughter and that the party is on again, even though she still has to serve her week's detention at school. Marcia becomes convinced her best friend Jenny was the guilty party and uninvites her. Greg and his brothers conspire to disrupt the party; the boys place itching powder in the girls' sleeping bags. While the girls clean up, Paula, another one of Marcia's friends, admits she took the drawing and wrote the insulting remark below it. Marcia is so embarrassed she re-invites Jenny to the party after all.

The Un-Underground Movie

Air date: 10/16/70

Greg films a documentary on the First Thanksgiving, "Our Pilgrim Fathers", starring the Bradys, for a class project. However, things get out of hand when the Brady kids all argue over roles, and Mike makes too many suggestions on the script. In the end, Greg takes control and the movie turns out to be a success.

Going, Going...Steady

Air date: 10/23/70

Marcia's new boyfriend Harvey Klinger is a nerdy insect collector. At first, the whole Brady family helps Marcia win Harvey's affection, including helping Marcia learn more about bugs. When Marcia succeeds, Carol and Mike end up feeling uneasy about their oldest daughter starting to "go steady".

Call Me Irresponsible

Air date: 10/30/70

When Greg wants money to buy a new car, Mike hires him as an office assistant at Mike's architectural firm. Greg is fired on the first day, when he loses important blueprints at a newsstand. Mike convinces Mr. Ed Phillips to give him one more chance, and Greg is rehired. Greg, however, loses a second set of plans, but manages to find them.