Knights and a bucketman are a major occurrence in Busytown.

The life of cave pigs is featured.

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Billy Dog gets his first pair of glasses.

Cordelia debuts.

Lowly Worm takes part in a circus.

A big dare takes place.

Oliver gets problems with his sandwich.

Pig Will becomes Pig Won't.

Two birthday parties take place in Busytown.

Martha reads her first book.

Someone gets locked out.

Father Cat does a new job.

The story of America being discovered is featured.

Mr. Grankle's friends are introduced.

Denys go to camp.

Peasant Pig gets his own gifts.

Little Fixit, the sister of Mr. and Mrs. Fixit is introduced.

A school dance takes place.

The story of the Greek Olympics is featured.

Hilda runs for president.

Mr. Frumble's twin brother is introduced.

The Viking pigs are introduced.

Miss Honey and Bruno Bear are getting married.

A tough test takes place.

The story of the discovery of the first pyramid is featured.

Billy's mother goes on a date.

One of Busytown's residents gets an award for being the inventor of the year.

Macaroni Polo is introduced.

Lone Wolfe is at a lighthouse.

A big riddle race takes place in Busytown starting at the Fire station (with the riddle "When things get really hot, we'll bring you some water") and ending at the Observatory (with the riddle "When it gets dark, look up and watch the show").

The story of the first balloon (a.k.a. Montgolfier) is featured.

Billy Dog loses a meteorite from the observatory and tries to find and return it.

Wolfgang, Benny and Harry open a big amusement park, but having trouble in the process.

The story of the first bridge is featured (caused by a toppling tower that lands on the river).

The class has to take photos of their families, but experiencing many problems and Huckle finally succeeds in taking the best picture.

Sally's book goes missing.

P.J. Pig does his best.

Vanderbuilt gets new shoes.