Adventure Time: It Came From the Nightosphere DVD

 Street Date: March 6, 2012

The full list of 16 episodes featured in the Adventure Time "It Came From the Nightosphere" DVD is:

1. It Came From the Nightosphere
2. Rainy Day Daydream
3. Wizard
4. Power Animal
5. Enchiridion
6. Slumber Party Panic
7. The Real You
8. Memory of a Memory
9. Prisoners of Love
10. Crystals Have Power
11. Business Time
12. Mystery Train
13. Guardians of Sunshine
14. The Monster
15. Hit Man
16. The Creeps

Taken from: http://www.tvshowsondvd.com/news/Adventure-Time-Finn-Jake-Nightosphere/16240#ixzz1fQ9W20vW

You can preorder it

here