"Killer B and Motoi" (キラービーとモトイ, Kirābī to Motoi) is episode 244 of the Naruto: Shippūden anime.
Struggling with the Falls of Truth and his darker side, Naruto requests help from Motoi, asking how Killer B overcame his dark side, who due to the seriousness of the situation and the effect on peace that Naruto gaining control of the Nine-Tails would have, agrees to, telling him and Yamato of B's past. After telling Naruto of his father's death at the hands of the Eight-Tails and B's shunning as the new Eight Tails jinchūriki, Motoi confides that he cannot personally request help from B, as he once made an attempt on his life in revenge for his father. Naruto leaves for a moment of solice, only for Motoi and Yamato to be attacked by the Giant Squid, with Motoi been captured. Restraining the squid, before Naruto who had initially refrained from attacking, believing the squid to be Killer B in his Eight-Tails form angrily attacking Motoi, only for the real Killer B to arrive and quickly defeat the squid. Motoi tells Killer B the truth of his attempt on his life, only for him to respond with a fist bump.