1. In which episode Obito reveals himself?
2. Which episode does Tobi show his face?
3. Does Kakashi recognize Tobi?

In which episode Obito reveals himself?

“Obito and Madara” (オビトとマダラ, Obito to Madara) is episode 344 of the Naruto: Shippūden anime.

Which episode does Tobi show his face?

Although we are less than half his face in Episode 139. And what he saw with his face exposed in his youth in the 136’s and 140’s.

Does Kakashi recognize Tobi?

Second time… after Kage Summit when they were staying in that snow country and Tobi shows up to tell Naruto about eternal cycle of hatred and his unavoidable battle with Sasuke. Though, Kakashi never realized until Tobi started dropping hints in the 4th War face-off.