Season 1

1. Leave the House-Sitting to the Dog / The Beggar Robot

Osomatsu and Choromatsu mind Chibita as babysitters, but grow bored and decide to have a mysterious dog take the heed instead. / Dekapan creates a robot powered by spare change that inadvertently leads to disaster in the hands of the sextuplets.

1966-02-05 • 25 min

2. Iyami's Fishing Pond / The 40 Thieves

Iyami attempts to con Osomatsu, Choromatsu, and Chibita out of their hard-earned money at his fishing pond with a rare fish that gives them all their money back if caught. / Chibita plays the role of the leader of a gang of thieves who target Osomatsu for discovering their misdeeds.

1966-02-12 • 25 min

3. Chibita's Stray Cat Strategy / A Thief Fell From The Sky

Totoko's grandpa enlists the help of the sextuplets to stop Chibita and his gang of feral cats from attacking the fish store. / Iyami and Chibita fly around town in a helicopter to cause mischief amongst the locals.

1966-02-19 • 25 min

4. The Helpful Robot / Iyami's Cleaning Store

A housework robot (shaped like Chibita) causes havoc amongst the Matsuno family when he malfunctions. / Iyami runs a scam out of a laundromat to catastrophic failure.

1966-02-26 • 25 min

5. There's the Shortcut / Laughing Costs 1 Million Yen!

Iyami and Chibita feign construction workers to scam the sextuplets out of their money by making a paid shortcut to school. / A camera company offers a cash prize for whoever can photograph a face-making man without any made faces, leading the sextuplets and Chibita to try to claim the reward.

1966-03-05 • 25 min

6. Osomatsu Targeted / Chibita's Martial Arts

Spooky things seem to be happening around town, leading the sextuplets to discover a secret of their own appearance. / Chibita challenges the brothers to a martial arts battle.

1966-03-12 • 25 min

7. The Magical Tea Kettle / The Angry Superman

Iyami scams the sextuplets with a magic kettle, actually utilizing Chibita as the secret inside. / Chibita and the shapely-mouthed Bokeo get revenge on the sextuplets for harming their frog friend.

1966-03-19 • 25 min

8. It's All Fine Until You Take Off His Hat / Boar Hunting

Chibita appears alongside Totoko wearing a strange hat that, when removed, changes his temperament from good to bad, leading to chaos amongst the Matsunos. / Chibita goes boar hunting and encounters the sextuplets and Iyami.

1966-03-26 • 25 min

9. Iyami the Dentist / Defeat the Mosquitoes' Enemies!

Osomatsu visits dentist Iyami's office for a toothache, but due to an unpaid bill, assists him in fixing up the mouth of Dekapan's crocodilian "son". / After Chibita's mosquito colony is destroyed by the sextuplets, he and Iyami create a watermelon-shaped bomb to enact revenge.

1966-04-02 • 25 min

10. I am Chibita, The Giant! / Counterattack Operation Pepen

Chibita, with the help of his scientist uncle, devise a plan to shrink the sextuplets down to flea size so that he will no longer be shorter than them. / A roaming minstrel and Chibita team up to enact revenge on the sextuplets with their army of cats.

1966-04-09 • 25 min

11. Osomatsu-kun Gets Adopted / Chibita the Invisible Man

A wealthy couple pay the sextuplets' parents to loan one of their boys out to them as a paid son, but the love they have for Osomatsu and Choromatsu is much too young for them. / Chibita and the brothers drink an invisibility potion and cause mischief.

1966-04-16 • 25 min

12. The Cutie Who Moved Close By / Rampage of the Smog Family

A new girl moves into the neighborhood, and the sextuplets try to put the moves on her while confusing her dad for their eerily-resembling dog. / A crime family that Chibita is a part of has business with the sextuplets, climaxing in a rainy nighttime brawl.

1966-04-23 • 25 min

13. The Opposite-Head Experiment / Iyami the Designer

An apple-headed doctor conducts an experiment on the sextuplets, but his seemingly strange mood swings are more than meets the eye. / Iyami works as a bespoke clothing designer for the Matsunos, but suspicions are aroused when the family's Children's Day koinobori goes missing.

1966-04-30 • 25 min

14. Iyami's Ninja Methods / Keke, I'm the Class President!

Ninjutsu master Iyami enlists the help of his disciples Chibita and Moguramaru to get revenge on the sextuplets. / Chibita attempts to thwart Totoko's run as Class President.

1966-05-07 • 25 min

15. Chibita, Did You Turn Into a Dog? / The Suspicious Transfer Student

Chibita takes the place of Dekapan's trained dog "son" when ringmaster Iyami buys him for his circus. / A student with a padlocked hat transfers to the sextuplets' school, leading to a mystery of his identity.

1966-05-14 • 25 min

16. The Time Machine Sends Us to the Stone Age / The Junk Strategy

The Matsunos take a trip in a wacky inventor's time machine to the age of the dinosaurs, where they meet their friends' prehistoric counterparts. / Neighbors Iyami and Chibita go to war with the Matsunos over trash disposal.

1966-05-21 • 25 min

17. Chika-chan and Chibita / Don't Wake The Sleeping Child

Chibita falls in love with snooty Chikako, but the sextuplets' faulty attempts at woo cause more than trouble for the little lovebirds. / The sextuplets watch over a sleepwalking boy who becomes violent when awoken.

1966-05-28 • 25 min

18. Suspicious Presents / See Doctor Chibita For Tooth Decay

A Santa Claus-like figure arrives in the town, in actuality a persona put on by burglar Moguramaru to hide stolen goods. / Deranged dentist Chibita enacts periodontal violence against people with better teeth than him.

1966-06-04 • 25 min

19. Is Chibita a Good Boy? / Chibita's Girlfriend

The sextuplets become victims of a vindictive clothesless Chibita, who tries to steal their clean clothes. / The Matsunos offer Dekapan a place for his pig "daughter" to stay, but Chibita falls in love with her without knowing she isn't human.

1966-06-11 • 25 min

20. Iyami the Rude Guest / Chibita the Sailor

The sextuplets' father invites work friend Iyami over for dinner, but chaos ensues in response to his disruptive behavior. / Chibita attempts to sneak onto an ocean liner under the guise of a sailor.

1966-06-18 • 25 min

21. Iyami's French Eaves / Dad Ran Away

Iyami runs a "genuine" French restaurant with Chibita, and receives criticism for his poor service and lack of research. / Mr. Matsuno resigns from his position as patriarch, and runs away.

1966-06-25 • 25 min

22. Iyami's Diamond Dentures / Forward! Cat Troopers

Ultra-rich Iyami accidentally breaks his bejeweled dentures, so with the help of his assistant Chibita, he tries to pin the blame on the sextuplets. / Chibita's army of cats ransack the town's oden vendors of his most favorite food, leading Iyami and the sextuplets to take him out.

1966-07-02 • 25 min

23. The Suspiscious Mynah Bird / Chibita's Lullaby

A mynah bird settles into the sextuplets' birdhouse village, but is harboring a less-than-desired guest in its home. / Chibita becomes a foster mother for a foundling.

1966-07-09 • 25 min

24. Get That Lousy Fugitive! / I'm Rich, da jo

1966-07-16 • 25 min

25. The Super-Cheap Old Man / Hoe Hoe, Mountain Climbing

1966-07-23 • 25 min

26. The Fortune-Telling Machine from France / We'll Do Anything in Six Rounds!

1966-07-30 • 25 min

27. Dad's Robot Strategy / Stop the Lying Duo!

1966-08-06 • 25 min

28. Rickety Camp Riot / Be a Security Guard, Osomatsu-kun!

1966-08-13 • 25 min

29. The Sextuplets Become Seven / Promotional Sales War

1966-08-20 • 25 min

30. Go For It, Kumamatsu / Chibita's a Pet

1966-08-27 • 25 min

31. Goronyan, the Meteorologist / Lonely Kappataro

1966-09-03 • 25 min

32. Say Not the Truth / The ¥100,000 Ghost Phone

1966-09-10 • 25 min

33. Iyami's Fake Beach House / Chibita's Big Circus

1966-09-17 • 25 min

34. Chibita Walks the Tightrope / Osomatsu is a Bad Kid

1966-09-24 • 25 min

35. I Hate This Naughty Dog! / The Cries of a Child Summon the Ant Troops

1966-10-01 • 25 min

36. Chibita's Oden Neurosis / Trick the Tanuki!

1966-10-08 • 25 min

37. Papa, Please Don't Smoke / Chibita Soars Through the Skies

1966-10-15 • 25 min

38. Only Chibita Has Filial Piety / Golf is Expensive, jo

1966-10-22 • 25 min

39. Dekapan's Big Horse Race

1966-10-29 • 25 min

40. It's a First-Class Car Race, jo / Chibita the Zookeeper

1966-11-05 • 25 min

41. A Fight Over a Flower / Were You Kidnapped, Osomatsu-kun?

1966-11-12 • 25 min

42. I've Quit Safecracking!

Safecracker Chibita, released on parole, mustn't break into another safe or else he'll be back behind bars. But what will happen when he must use his talents to save a life?

1966-11-19 • 25 min

43. The Grand Prix Elimination Race / The Search for Chibita's Parents

1966-11-26 • 25 min

44. Let's Try to Ski for Free

1966-12-03 • 25 min

45. Please Return My Bonus! / Go For It, Kumamatsu

1966-12-10 • 25 min

46. The Arsonist Loves Oden / Fighting Robot Rampage

1966-12-17 • 25 min

47. A Dreadful Christmas Season-zansu / The Sextuplets Become Seven

1966-12-24 • 25 min

48. A Guide to a Bear Parent and Child / Dekapan Olympics

1966-12-31 • 25 min

49. Totoko-chan's New Years' Card / Laughing Costs 1 Million Yen!

1967-01-07 • 25 min

50. Skiiing in a French Fashion / I Don't Need the Magic Lamp Anymore

1967-01-14 • 25 min

51. The Scary Old Hag / Speak Not the Truth

1967-01-21 • 25 min

52. The Time Machine Sends Us to the Stone Age / Iyami's French Eaves

1967-01-28 • 25 min

53. Keke, I'm the Great Detective / Leave the House-Sitting to the Dog

1967-02-04 • 25 min

54. My Head Shines the Brightest in the World / Papa, Please Don't Smoke

1967-02-11 • 25 min

55. Headed to Chibita's Jungle / Golf is Expensive, jo

1967-02-18 • 25 min

56. Chibitaro, Born From a Peach / The Grand Prix Elimination Race

1967-02-25 • 25 min

57. Kekeke, a Surprise Aerial Attack / Special Program: "We Are Sextuplets"

1967-03-04 • 25 min

58. I've Quit Safecracking!

1967-03-11 • 25 min

59. Let's Try to Ski for Free

1967-03-18 • 25 min

60. Dekapan's Big Horse Race

1967-03-25 • 25 min