Naruto Shippuden Episode 16

Naruto Shippuden 16 - The Secret of Jinchuriki Kakashi's and Guy's teams both realize that their battles with the doppelgangers were set-up to hold them from coming to save Gaara. Chiyo reveals that in attempts to prove the power of the tailed beasts they were bounds to human hosts called "Jinchuriki", and that the human body dies when the beast is extracted - increasing the urgency of saving Gaa [link]