A new animated Cartoon Network show, Adventure Time, starting tomorrow tonight, follows the adventures of a silly kid called Finn, and an old, kind-hearted dog named Jake.

Finn will stop at nothing to become a hero. The two always stay together and find themselves in the middle of heart-pounding adventures.

This all takes place in a mystical land called "Ooo", which has mountains, lush green plains, forests and winding rivers.

One of the characters is Princess Bubblegum, who often finds herself in awkward situations. Lady, the Rainicorn, is Jake's girlfriend. She has the mind of a puppy, but can play classical music.

Marceline, the vampire queen, is a wild rocker girl who has lived for centuries. Lich King has evil powers that make him destroy things he doesn't want. The story begins with Lich King sealed in his castle, waiting for someone to unlock the magic binding his evil power.

• Adventure Time starts tomorrow at 6.25pm