Naruto Shipuden Episode 39

Yamato diguises himself as Sasori (inside Hiruko) and goes to confront the spy at Tenchi bridge. The spy is revealed to be Kabuto who tells him the location of Orochimaru's hideout before the meetin ends Orochimaru appears and Kabuto attack's Kabuto ends his charade and attacks Yamato and he then calls out Naruto,Sakura and Sai