"Chiyo's Secret Skills" (チヨの奥の手, Chiyo no Oku no Te) is episode 22 of the Naruto: Shippūden anime.
Naruto continues to follow Deidara, who considers himself lucky that will have taken down not one but two jinchūriki. Only wanting to take on Naruto, he attempts to ditch Kakashi using his Explosive Clay, but Kakashi prevails. As his supply of clay is running low, he realises that he must face Kakashi along with Naruto at the same time. Kakashi continues to follow as he is already too far from the others, even noting that he is about to be out of range of the wireless radio's transmission.
Sakura manages to escape the poison gas cloud by using an explosive tag, the blast dissipating the gas. She tells Sasori that he will be taken down by her, but Sasori responds by sending multiple kunai her way. Chiyo blocks the move by using the "Mother" and "Father" puppets, that Sasori had modelled out of his dead parents as a child. Sasori finds the idea absurd, as he designed those puppets and knows how they work. Nonetheless, Chiyo has the Mother and Father puppets pull out wire string and have them charge at Sasori. The puppets manage to slice through the Third Kazekage puppet'sThousand Hands Manipulation Force. Sasori detaches the left arm of the puppet before Chiyo's could slice through them. The left arm is revealed to have a buzzsaw, but the Mother and Father puppets have hidden weapons of their own. After going through an intense puppet battle, Chiyo manages to destroy the buzzsaw while Sasori destroys the Mother's sword and the Father's club. Deciding to use his trump card, Sasori unveils the Third Kazekage's secret technique: Iron Sand, touted to be the most dangerous technique in Sunagakure history.
Meanwhile, Team Guy are having trouble fighting their clones, exhausted from their efforts and no one except Guy being able to land a blow on their counterparts.