Episode 490 of Naruto: Shippuden drops Shikamaru into a spy game, where a disguised infiltration of the town of Tobari forces him to gamble on whether the reckless Hinoko is defecting for real or playing a part.
An unseen figure works to sour Sai on the Leaf, needling him about his place in Team 7 and about Sasuke's return. Chasing Sai's trail to an inn, Shikamaru dresses himself, Hinoko, and Rō as traveling merchants to slip through a checkpoint into Tobari. Hinoko favors killing the lookouts outright, but Shikamaru warns that leaving bodies would expose the Leaf's hand, noting that Sai's original team was already wiped out. She ignores him and drops two spying shinobi with her chakra needles, one of whom lands on their cover vehicle. Inside the inn, Shikamaru wins useful information over a game of shōgi.
The discovery of Hinoko's incapacitated victim locks down the inn, forcing an identity check that a local named Komori, no friend of Tobari's officials, helps them dodge. Hinoko keeps clashing with Shikamaru over her freedom to act and muses aloud about the Land of Silence, while Rō confides her fear that peacetime will make shinobi obsolete. After overhearing Rō and Shikamaru discuss silencing her should she truly defect, Hinoko heads for the checkpoint and announces her wish to join the Land of Silence, wounding a guard to prove herself. The guards recognize the injury as matching their dead comrades, and a fight erupts when Shikamaru and Rō arrive.
The apparent betrayal is a ruse. Hinoko strikes down Rō and Shikamaru with her needles to sell her defection, but only puts them into a temporary death-like state, and later sedates Komori as well. Rō and Shikamaru had already pegged Komori as a plant, confirming it when he reacted to a faked chakra presence, and the trio successfully slip into Tobari. The episode opens the Shikamaru Hiden arc, adapting the light novel, and uses the theme Empty Heart with the ending Absolutely.

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In "Dark Clouds," episode 490 of Naruto: Shippuden, Shikamaru disguises himself, Hinoko, and Ro as merchants to infiltrate the town of Tobari while chasing Sai's trail, and clashes with Hinoko over her ruthless tactics after she kills two enemy scouts.
Shikamaru infiltrates the town of Tobari, disguised as a traveling merchant along with Hinoko and Ro, to follow the trail of Sai after an unseen figure works to turn Sai against the Hidden Leaf.
Shikamaru and Hinoko clash over her willingness to kill enemy lookouts outright, since he warns that leaving bodies would expose the Leaf's involvement, but Hinoko ignores him and drops two spying shinobi with her chakra needles anyway.
Hinoko's apparent defection at the Tobari checkpoint is a ruse. After overhearing Ro and Shikamaru discuss silencing her if she truly defected, she wounds a guard to fake joining the Land of Silence, but she and her allies successfully slip into Tobari.
"Dark Clouds" opens the Shikamaru Hiden arc, an adaptation of the light novel, pairing the opening theme "Empty Heart" with the ending song "Absolutely."
Looking for more on Dark Clouds? The Naruto Wiki on Fandom has a dedicated page with community notes.
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