Naruto Shippuuden episode 125 starts with the ending clip of episode 124. Deidara detonates himself and in attempt to kill Sasuke. The blast is designed to wipe out everything in a very large radius and can be seen from a long distance. Naruto's team watches the explosion in wonder, while Sasuke's team watches in dismay, realizing that the explosion was close to their rendezvous point. In fear that Sasuke may have been killed, Karin checks for signs how his chakra. There are none. Presumably, Deidara, Sasuke, and Tobi have all been annihilated in the blast.
News gets to Akatsuki of the three deaths. There is a brief look of shock on Itachi's face when he hears the news of his brother's death. The other Akatsuki members seem divided on whether to mourn Deidara or Tobi.
Just when you think that Sasuke might really be dead, he reems through a summoning spell. Cut up and bruised, he managed to hide himself inside of Manda and use a transportation jutsu to avoid being blow to bits. Unfortunatly, Manda, Orochimaru's favorite pet snake, is a casualty of this move. Either way, Sasuke is badly injured and is taken to rest in the city.
It does not take long before Naruto and his team figure out the output of Sasuke's battle with Deidara and are hot on Sasuke's trail again. Meanwhile, the loyalty of Team Eagle shines through as they prove their loyalty to Sasuke. Jugo nurtures Sasuke back to help while Seigetsu and Karin argument. They may not like each other, but neither one refuses to leave Sasuke's side.
Itachi takes a moment of silence in the rain and it sees as if for a moment he is mourning Sasuke, but his senses are strong and he reasserts that Sasuke is still alive. We finally get a better look at Pein, and a new unknown Akatsuki member by his side. It appears that Sasuke killing Itachi is exactly what Akatsuki has planned all along. The last surprise twist of this episode shows Tobi alive and well, and his true identity is revealed as Madara Uchiha. Who would have thought?