Osomatsu-kun - Season 1
1 - Leave the House-Sitting to the Dog / The Beggar Robot
Air Date: February 5, 1966
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.
2 - Iyami's Fishing Pond / The 40 Thieves
Air Date: February 12, 1966
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.
3 - Chibita's Stray Cat Strategy / A Thief Fell From The Sky
Air Date: February 19, 1966
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.
4 - The Helpful Robot / Iyami's Cleaning Store
Air Date: February 26, 1966
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.
5 - There's the Shortcut / Laughing Costs 1 Million Yen!
Air Date: March 5, 1966
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.
6 - Osomatsu Targeted / Chibita's Martial Arts
Air Date: March 12, 1966
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.
7 - The Magical Tea Kettle / The Angry Superman
Air Date: March 19, 1966
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.
8 - It's All Fine Until You Take Off His Hat / Boar Hunting
Air Date: March 26, 1966
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.
9 - Iyami the Dentist / Defeat the Mosquitoes' Enemies!
Air Date: April 2, 1966
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.
10 - I am Chibita, The Giant! / Counterattack Operation Pepen
Air Date: April 9, 1966
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.
11 - Osomatsu-kun Gets Adopted / Chibita the Invisible Man
Air Date: April 16, 1966
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.
12 - The Cutie Who Moved Close By / Rampage of the Smog Family
Air Date: April 23, 1966
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.
13 - The Opposite-Head Experiment / Iyami the Designer
Air Date: April 30, 1966
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.
14 - Iyami's Ninja Methods / Keke, I'm the Class President!
Air Date: May 7, 1966
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.
15 - Chibita, Did You Turn Into a Dog? / The Suspicious Transfer Student
Air Date: May 14, 1966
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.
16 - The Time Machine Sends Us to the Stone Age / The Junk Strategy
Air Date: May 21, 1966
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.
17 - Chika-chan and Chibita / Don't Wake The Sleeping Child
Air Date: May 28, 1966
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.
18 - Suspicious Presents / See Doctor Chibita For Tooth Decay
Air Date: June 4, 1966
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.
19 - Is Chibita a Good Boy? / Chibita's Girlfriend
Air Date: June 11, 1966
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.
20 - Iyami the Rude Guest / Chibita the Sailor
Air Date: June 18, 1966
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.
21 - Iyami's French Eaves / Dad Ran Away
Air Date: June 25, 1966
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.
22 - Iyami's Diamond Dentures / Forward! Cat Troopers
Air Date: July 2, 1966
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.
23 - The Suspiscious Mynah Bird / Chibita's Lullaby
Air Date: July 9, 1966
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.
24 - Get That Lousy Fugitive! / I'm Rich, da jo
Air Date: July 16, 1966
25 - The Super-Cheap Old Man / Hoe Hoe, Mountain Climbing
Air Date: July 23, 1966
26 - The Fortune-Telling Machine from France / We'll Do Anything in Six Rounds!
Air Date: July 30, 1966
27 - Dad's Robot Strategy / Stop the Lying Duo!
Air Date: August 6, 1966
28 - Rickety Camp Riot / Be a Security Guard, Osomatsu-kun!
Air Date: August 13, 1966
29 - The Sextuplets Become Seven / Promotional Sales War
Air Date: August 20, 1966
30 - Go For It, Kumamatsu / Chibita's a Pet
Air Date: August 27, 1966
31 - Goronyan, the Meteorologist / Lonely Kappataro
Air Date: September 3, 1966
32 - Say Not the Truth / The ¥100,000 Ghost Phone
Air Date: September 10, 1966
33 - Iyami's Fake Beach House / Chibita's Big Circus
Air Date: September 17, 1966
34 - Chibita Walks the Tightrope / Osomatsu is a Bad Kid
Air Date: September 24, 1966
35 - I Hate This Naughty Dog! / The Cries of a Child Summon the Ant Troops
Air Date: October 1, 1966
36 - Chibita's Oden Neurosis / Trick the Tanuki!
Air Date: October 8, 1966
37 - Papa, Please Don't Smoke / Chibita Soars Through the Skies
Air Date: October 15, 1966
38 - Only Chibita Has Filial Piety / Golf is Expensive, jo
Air Date: October 22, 1966
39 - Dekapan's Big Horse Race
Air Date: October 29, 1966
40 - It's a First-Class Car Race, jo / Chibita the Zookeeper
Air Date: November 5, 1966
41 - A Fight Over a Flower / Were You Kidnapped, Osomatsu-kun?
Air Date: November 12, 1966
42 - I've Quit Safecracking!
Air Date: November 19, 1966
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?
43 - The Grand Prix Elimination Race / The Search for Chibita's Parents
Air Date: November 26, 1966
44 - Let's Try to Ski for Free
Air Date: December 3, 1966
45 - Please Return My Bonus! / Go For It, Kumamatsu
Air Date: December 10, 1966
46 - The Arsonist Loves Oden / Fighting Robot Rampage
Air Date: December 17, 1966
47 - A Dreadful Christmas Season-zansu / The Sextuplets Become Seven
Air Date: December 24, 1966
48 - A Guide to a Bear Parent and Child / Dekapan Olympics
Air Date: December 31, 1966
49 - Totoko-chan's New Years' Card / Laughing Costs 1 Million Yen!
Air Date: January 7, 1967
50 - Skiiing in a French Fashion / I Don't Need the Magic Lamp Anymore
Air Date: January 14, 1967
51 - The Scary Old Hag / Speak Not the Truth
Air Date: January 21, 1967
52 - The Time Machine Sends Us to the Stone Age / Iyami's French Eaves
Air Date: January 28, 1967
53 - Keke, I'm the Great Detective / Leave the House-Sitting to the Dog
Air Date: February 4, 1967
54 - My Head Shines the Brightest in the World / Papa, Please Don't Smoke
Air Date: February 11, 1967
55 - Headed to Chibita's Jungle / Golf is Expensive, jo
Air Date: February 18, 1967
56 - Chibitaro, Born From a Peach / The Grand Prix Elimination Race
Air Date: February 25, 1967
57 - Kekeke, a Surprise Aerial Attack / Special Program: "We Are Sextuplets"
Air Date: March 4, 1967
58 - I've Quit Safecracking!
Air Date: March 11, 1967
59 - Let's Try to Ski for Free
Air Date: March 18, 1967
60 - Dekapan's Big Horse Race
Air Date: March 25, 1967