"Obito and Madara" (オビトとマダラ, Obito to Madara) is episode 344 of the Naruto: Shippūden anime.
An unmasked Obito is joined by Madara, who was assumed to still be battling the five Kage. This leads Naruto to immediately question Madara of their condition. Madara nonchalantly responds that they are "not doing so well". Tsunade, even though bisected, uses her remaining strength to summon Katsuyu, saying she could still save the other Kage. As the two Uchiha converse about the progress of their plans, Madara wonders why he was not revived as a living person, to which Obito notes Nagato had betrayed them and used the Outer Path — Samsara of Heavenly Life Technique on the Konohashinobi instead. Naruto attacks Madara, enraged at the fact that he used Nagato. The Uchiha easily counters with his gunbai and attacks; his fan triggering a beam of light that sends Naruto flying back, revealing that the Naruto who had attacked Madara was in fact a shadow clone. Madara prepares to take on Naruto, leaving Obito to deal with Guy and Kakashi. Meanwhile, Obito recalls his first ever meeting with an elderly Madara, who had saved him from beneath the boulders. As Madara tells the younger Uchiha of his goals to unify the world, Obito — uninterested — attempts to escape, eager to meet his team-mates once again.
When Naruto asked Madara about the Kage status, Gaara was not seen on-screen at first. After Tsunade summoned Katsuyu, he was shown just like the other Kage.
Obito's scar on his face is on the right side but here it's on his left side.