Episode 1: "Hamtaro"
When Hamtaro and Laura move to their new neighborhood, Hamtaro sets off to find some friends. He meets a hamster named Oxnard, and they become good friends. Together, they meet up with Boss and also become friends.Laura also meets a new friend named Kana,and they go shopping.

Episode 2: "The Ham-Ham Clubhouse"
On Laura's first day of school, Hamtaro decides to tag along. But he soon meets Oxnard and Boss, and they introduce him to more Ham-Hams. But, a huge rainstrom pours down on them, and it leaves them under a tree. A cat soon encounters, and Hamtaro saves Penelope. They go to the hideout, and clean up the place, and Hamtaro decides to make it into the Ham-Ham Clubhouse.

Episode 3: "Calling all Ham-Hams"
Since the Ham-Ham Clubhouse opened, Hamtaro's been meeting new hamsters.Laura gets 100% on her math test, she tries to tell her parents, but they are busy. This makes Laura sad. Then, Boss gets stuck in a tree, and all the Ham-Hams have to pull together to rescue him.

Episode 4: "Come out Bijou"
During Summer Vacation, Laura feeds the fish at school, and she gets herself wet. Travis, her crush, hands her a towel, and when she returns it, she can't help but blushing. Meanwhile, Boss has a crush on Bijou and there's one problem. Bijou won't visit him at the clubhouse. Boss gets help from Hamtaro, and he helps Bijou come out of her cage. Once Bijou comes, everybody is happy, excpecially Boss.

Episode 5: "Diamonds of Sugar"
One day, Hamtaro overhears Laura and Kana talking about a candy called "Diamonds of Sugar". Hamtaro being so curious goes to the clubhouse and asks if anyone has ever heard of these. Nobody has a clue, and Boss suggests that they may be candy that falls from the sky. When Laura and Kana have a BBQ, the Ham-Ham's have a picnic themselves, and try to catch the shooting stars. But they cannot reach a single one! When Laura tells Hamtaro to wish on them, Hamtaro wished that they will fall all around him.

Episode 6: "First Time at the Beach"
Laura's parents take her on her first trip to the beach, but when they tell her that the water can be dangerous for hamsters, she decides not to take Hamtaro. However, Hamtaro and the Ham-Hams have other ideas! They want to see the ocean, so they make a plan to go to the beach too, after agreeing that if they stick together, they can look out for one another.

Episode 7: "A Summer Festival Adventure"
On a warm summer day, Laura and Kana dress in kimonos to go to the Summer Festival. Curious to know what a festival is, Hamtaro follows Laura, and meets up with Boss, Maxwell, and Pashmina. Maxwell explains that at such festivals, flowers bloom in the sky! What are these flowers in the sky? When Pashmina tries to find the answer, she gets lost from the group. The Ham-Hams launch a search party for Pashmina. When they finally find her, she is in tears. But soon she is laughing again, when the Ham-Hams finally see the sparkling flowers of light blooming in the sky!

Episode 8: "The Sunflower Field"
Hamtaro goes with Laura and her family to visit her grandmother in the country. The Ham-Hams are excited for Hamtaro, because Grandmother's house is surrounded by sunflower fields. When they arrive in the country, Hamtaro learns that Boss has come along in the car! While Laura and Grandma are painting on the hillside, Hamtaro gets out of his cage to play with Boss in the sunflower fields. But when they decide to return, they realize that they've gotten lost! When Laura finds Hamtaro, she tells him she's sorry for not keeping a better eye on him. Back at the Clubhouse, Hamtaro and Boss can't wait to tell the other Ham-Hams about their big adventure in the country, and of course to share with them lots of sunflower seeds.

Episode 9: "Much Ado About School"
It's the time of year where Laura is going back to school! Laura says that she is excited about having Mr. Yoshi as a teacher, but Hamtaro is jealous because he thinks Mr. Yoshi is a hamster! But when they find out they're wrong, the Ham-Hams decide to make their own school, with Maxwell as the teacher! But conflicts arrive as they build their own school, but they work it out the right way!

Episode 10: "Jingle the Wanderer"
Laura's dad promised Laura that they would go to the amusment park today, but Mr. Haruna is stuck at work. So, Laura has to run a floppy disk to her dad, and Hamtaro, Oxnard, and Penelope tag along. But Laura bumps the bag, and the Ham-Hams, including the disk, fly out of the bag. They meet Jingle, a Ham-Poet, who trys to help them find the 'flop-ee'. They find it, return it to Laura secretly, and ride home happily, and on the way, they met a new friend, Jingle!

Episode 12: "Bijou's in Danger!"
Bijou is stuck down in Fish Alley, a place where cats hang around, because it smells like fish! So the Ham-Hams need to rescue her! It's not easy though, because she is sleeping with the cats, and they don't know how to get her out! So they make a Ham-Chain, and grab her out, but they wake the other cats too! So the Ham-Hams are on an amazing race as they outsmart the cat and save Bijou!

Episode 13: "Let's Dance Sandy"
Lately, Sandy has developed a crush on Maxwell, and Sandy is afraid to tell him. So Sandy asks Hamtaro to tell him, but the only thing is, Hamtaro doesn't remember what to tell Maxwell! But meanwhile, Laura and Kana talk to Sandy's owner, Hillary, and they learn more about her. And right when the Ham-Girls are doing a performance, Hamtaro remembers what to tell Maxwell, and it turns out, Maxwell loves Sandy the same way!

Episode 14: "The Search for Sandy's Brother"
The Ham-Hams hold a special meeting to begin the search for Sandys twin brother, but become daunted by the large task in front of them. In the meantime, Laura and Kana spend time with Sandys owner Hillary who introduces them to Noel, an instructor at the gym. They soon find out that Noel has a hamster named Stan. When Laura and Kana bring Hamtaro and Oxnard to the gym, they recognize Stan as Sandys brother.

When they meet Stan, Hamtaro and Oxnard are stumped by the flamboyant character of Sandys twin, and cant wait to bring him to the Ham-Ham Clubhouse for a surprise sibling reunion. When Sandy meets her long lost brother she is thrilled, but soon disapproves of his Casanova style and rebukes him after he starts flirting with all her friends. The two are close again at last, arguing just like brother and sister!

Episode 15: "Bijou's Favorite Ribbon"
On a school trip, the handsome Travis doesnt notice Lauras pretty hair ribbon that she wore just for him, and she is heartbroken. At the Ham-Ham Clubhouse, Hamtaro uses Bijous favorite hair ribbon for a blindfold in Blind Mans Bluff, and Bijou is furious. After everyone leaves, a sleepy Snoozer hears Bijou crying and wakes up for a moment to comfort her. He says that Hamtaro is forgetful but kind.

Heeding Snoozers wise words, she then decides to go where the Hamsters are picking acorns to find Hamtaro and make-up with him. When she gets there, she discovers that Hamtaro hurt his foot while picking acorns for her. Bijou comforts him, taking off her hair-ribbon to wrap his sprain. Later when Laura takes off her ribbon, Travis notices its gone. Maybe Travis and Hamtaro noticed more than either girl first imagined.

Episode 16: "Get Well Laura"
Laura isnt sleeping well these days because her energetic hamster Hamtaro is playing in his cage after hours. Meanwhile in the Ham-Ham Clubhouse, Boss has developed a stomachache. The wise Maxwell suggests that Boss eat some yogurt for his belly. But when they go to Hamtaros to get some, Hamtaro forgets where it is.

While the hamsters are raiding the refrigerator, Laura gets sent home from school with a cold. The Ham-Hams want to help nurse her back to health, and they decide they can cure her fever with a cool leaf that they place on her forehead. When she wakes up, her cold is gone, but she thinks she dreamt the whole thing. She could swear that she was being taken care of by lots of little hamsters.

Episode 17: "Hamtaro, the Super Sleuth"
There is a thief at Lauras school and also in the Ham-Ham Clubhouse! Hamtaro starts an immediate investigation and soon discovers many of the stolen items under Bosss bed. Boss declares his innocence, but the evidence makes it hard for the Ham-Hams to believe him.

After a dejected Boss locks himself in his room, Snoozers pillow gets stolen. Soon they discover that the thief is none other than little Penelope, who is just trying to act grown up by putting everyones things away. Laura too finds out that the mischievous black crows stole her pencil box, and Travis steps in to save the day, climbing a tree to retrieve it. Sigh!

Episode 18: "The Slipper Chase"
When Laura is asked to perform the role of Cinderella in the school play, the nervous actress accidentally leaves one glass slipper at home. When Hamtaro discovers the lost slipper, he and his Ham-Ham Friends set out to secretly deliver the slipper to the theater. They seek help from the wandering ham-poet, Jingle who is eager to help them find the mythical pumpkin coach where the play is in progress. With Jingles dreamy guidance, the hamsters meet a brood of unfriendly chickens and can only escape after their poetic leader accidentally frightens the chickens away. The Ham-Hams then secretly deliver the slipper before Lauras entrance and enjoy the rest of the play.

Afterwards, Laura meets Hamtaro back at home and tells him all about her performance. She then tells him she thinks that maybe someone is watching over her. Hamtaro breaks into a quiet smile.

Episode 19: "Panda's Ham-Ham Fun Park"
When Laura goes off to the amusement park with her dad, Hamtaro tells his pals at the Clubhouse, and they decide they want to build an amusement park of their own. Panda brags that its something hes always wanted to do and even shows them the blueprints, but Boss, Stan and Howdy think its just Pandas way of trying to get the girls.

Still, the other hamsters like the idea and start working with Panda. Eventually Stan and Howdy cant repress their urge to pitch in, and when Panda almost slips on a high branch, Boss steps in to rescue him.

Meanwhile, Lauras fathers car breaks down on the way to the big amusement park. Kana and her father drive by and while the two fathers fix the car; Laura and Kana amuse themselves at a smaller park nearby. Even after the car is fixed the girls decide to stay at the small park where they are having a great time. The hamsters too have wild fun at their Ham-Ham Fun Park. That day all the good things came in small packages.