The first three-fourths of the story is a monologue: a Terminator-like hugger robot with human emotions tells us the story of his life. He formerly worked for Aku, but stopped because of his emotions and because he felt in love with a little dog.
But Aku kidnapped his dog and forces him to fight against Jack if he wants to see it again. He is tracking Jack and he is finally destroyed by the samurai His last words are for his puppy and Jack looks sadly at him. Then there is a close-up of his car and the last image of the episode is a photo of the dog.

Samurai Jack Season 4 Episodes...

• s04e01 - XL: Samurai versus Ninja
• s04e02 - XLI: Robo-Samurai versus Mondo Bot
• s04e03 - XLII: Samurai versus Samurai
• s04e04 - XLIII: The Aku Infection
• s04e05 - XLIV: The Princess and the Bounty Hunters
• s04e06 - XLV: Scotsman Saves Jack (1)
• s04e07 - XLVI: Scotsman Saves Jack (2)
• s04e08 - XLVII: Jack and the Flying Prince and Princess
• s04e09 - XLVIII: Jack versus Aku
• s04e10 - XLIX: The 4 Seasons of Death
• s04e11 - L: Tale of X9
• s04e12 - LI: Young Jack in Africa
• s04e13 - LII: Jack and the Baby

Samurai Jack Show Summary

Made by Genndy Tartakovsky, this cartoon tells the story of a great warrior displaced to the distant future by the evil shape-shifting wizard Aku. The world has become a bleak place under the rule of Aku, segregated into fantastic tribes and ruled by Aku's evil robot warlords. Jack travels this foreign landscape in search of a time portal that can return him to his home time so he can 'undo the future that is Aku!'.