Hidan actually appears in Ep. 82, but before then he is shown as a hologram.
Episode 71 (part 2)
naruto shippuuden episode 72
Episode 77 to 79 :)
yugito fights hidan and kakuzu in episodes 72-88
Hidan makes his appereance with Kakuzu in episode 71: My friend.
Ep. 82-86
either shippuden 86 or 87
on shippuden, shikamaru defeats hidan on episode 87 or around that.
The dub episode isn't out yet but it'll be in the 70s-80s Shippuden.
Hidan Is First Seen In Naruto Shippuden Episode 10 Only In Hologram.Hidan is Seen Again In Episode 71 In Person.Kakuzu:Naruto Episode 135 (Hologram)Naruto Shippuden Episode 10 (Hologram)Naruto Shippuden Episode 71 (In Person)The Only Reason Hidan Wasn't Mentioned In Naruto Episode 135 Is Because He Wasn't In "Akatsuki" Yet.
ayes he dies but I'm not sure wich episode. Hidan kills him but don't worry Shikomaru will revenge him.
he dies in episode 79 by hidan but shikamaru takes his revenge. add by Annoth- the fatal blow is in 79 but he doent show signs of him atcualy being dead until the next ep