While Ruff Ruffman scrambles to get ready for the first episode, Anna, Julia, and Khalil go on a hunt for all nine planets in a scale model of the Solar System scattered throughout the "lovely city of Boston". Taylor, Noah, and Brian stay in Studio G (Ruff's garage).

Ruff Ruffman sends Julia and Khalil to learn how to dance the waltz, while Anna and Brian investigate whether dog mouths are cleaner than human mouths. Noah and Taylor stay behind.

Noah and Brian built a kite to deliver a dog biscuit, and Taylor and Anna attempt to teach cats to fetch. Julia and Khalil stay behind.

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Taylor, Brian, and Noah are required to make a music video with some easily-recognizable stars - their grandparents- while staying under a budget. Anna, Julia, and Khalil stay behind at Studio G.

Ruff gets stuck in a bee costume when filming an advertisement for FETCH!. Brian and Khalil learn to be beekeepers, while Julia and Anna learn to windsurf. Taylor and Noah stay in Studio G.

Ruff must sell his new beverage. Brian braves a day as a short-order cook in a local diner, while Taylor, Khalil, and Noah design a new ice-cream flavor with ingredients that start with the letters B, L, and T. Anna and Julia stay at the Studio.

Ruff forces the kids to retrieve a lost invention in the castle of inventor John Hays Hammond, Jr.

Ruff accidentally reduces the show's budget to 13¢. Norm Abram, one of the hosts of This Old House, another program on PBS, teaches Anna and Noah to build a lemonade stand. Anna and Noah must also test thermal insulation to sell lemonade as a fundraiser. Meanwhile, the rest stay in Studio G and help bail Ruff out with his financial problems.

Ruff is confused when a weather forecast predicts clear skies, but there is thunder. Taylor learns to forecast the weather, conduct interviews, and give a live weather report in front of a greenscreen. The boys paint a mural in Jamaica Plain for the mayor of Boston. Julia and Anna stay at Studio G once more.

Ruff Ruffman floods the doghouse when trying to relax. Julia, Anna, and Khalil build a boat out of recycled trash, test it out and race in it. Taylor, Noah, and Brian stay behind.

It is revealed that Ruff wanted to be a clown, but was cheated out by Spot Spotnik (see character list). Julia, Taylor, Noah, and Anna build water balloon launchers for revenge. Brian spends the day with Circus Smirkus and learns how to be a clown. Khalil stays behind, alone.

Under Grandma Ruffman's marketing advice, Khalil learns to be a stand-up comedian, and Taylor, Noah, and Brian cook Grandma Ruffman's recipes on a farm to learn about energy transfers in a New England food chain. Julia and Anna stay at Studio G.

Ruff is tired of his food. Taylor, Brian, Julia, and Khalil compete against each other as chefs - Iron Chef style to cook up new recipes for Ruff. Noah and Anna are left behind again, but help bail Ruff out.

Ruff is training for an interactive driving test monitored by the DMV, but crashes into a sea lion tank. Taylor trains sea lions; Julia helps in a pit crew for a junior go-karter. Anna, Khalil, Noah, and Brian stay behind.

Ruff decides to calm down from the stresses of running a show. The kids learn to relax with yoga and to calculate heart rate (pulses in 15 sec * 4). Next, they mathematically measure their "fear factor" at Canobie Lake Park, an amusement park in New Hampshire.

A cat steals Ruff's kneeboard. Noah learns to kneeboard. The girls track down wild animals using various clues, especially scat. Khalil and Brian stay in the studio.

The FETCHers go to space camp when the FETCH satellite breaks down.

Three rounds of competition and one ultimate quiz will pit the FETCHers against each other. At last Anna was crowned FETCH! seasonal champion.