http://www.imdb.com/title/tt1305826/

Summary:
Twelve-year-old Finn battles evil in the Land of Ooo. Assisted by his magical dog, Jake, Finn roams the Land of Ooo righting wrongs and battling evil. Usually that evil comes in the form of the Ice King, who is in search of a wife. He's decided he should wed Princess Bubblegum, though she doesn't want to marry him. Still, he persists in trying to steal her away, and Finn and Jake, along with Lady Raincorn (a cross between a unicorn and a rainbow) do their best to keep her from harm.

Adventure Time S04 WEB-DL 1080p x264 AAC [KTOON] (Size: 4.37 GB)
  01 - Hot to the Touch.mkv 222.52 MB
  02 - Five Short Graybles.mkv 163.09 MB
  03 - Web Weirdos.mkv 213.25 MB
  04 - Dream of Love.mkv 143.83 MB
  05 - Return to the Nightosphere.mkv 224.87 MB
  06 - Daddy's Little Monster.mkv 224.07 MB
  07 - In Your Footsteps.mkv 156.54 MB
  08 - Hug Wolf.mkv 142.34 MB
  09 - Princess Monster Wife.mkv 163.1 MB
  10 - Goliad.mkv 172.91 MB
  11 - Beyond This Earthly Realm.mkv 169.55 MB
  12 - Gotcha!.mkv 168.77 MB
  13 - Princess Cookie.mkv 143.31 MB
  14 - Card Wars.mkv 172.06 MB
  15 - Sons of Mars.mkv 164.96 MB
  16 - Burning Low.mkv 181.58 MB
  17 - BMO Noire.mkv 104.25 MB
  18 - King Worm.mkv 189.53 MB
  19 - Lady & Pebbles.mkv 158.88 MB
  20 - You Made Me.mkv 149.44 MB
  21 - Who Would Win.mkv 183.8 MB
  22 - Ignition Point.mkv 154.56 MB
  23 - The Hard Easy.mkv 208.24 MB
  24 - Reign of Gunters.mkv 196.03 MB
  25 - I Remember You.mkv 140.8 MB
  26 - The Lich.mkv 167.68 MB
Description
Here are my fancy encodings of the fourth season of Adventure Time. iTunes is kind of a mess, but I tried to fix that. Every episode is packed with its proper opening and ending.