Supernatural

Supernatural is an occult-based American television series that began production in 2005 and aired on the CW network. Created and produced by McG and Eric Kripke, the series revolves around the Winchester brothers, Sam and Dean and their never-ending struggle to stop the forces of the supernatural wherever they may arise. The initial premise of the series followed the Winchester brothers acros the United States investigating various ghost stories and ubran legends. As the series progressed, the shift focused towards battling demons who have escaped from Hell and were loose on Earth. Although the primary cast consists only of Jared Padalecki (Sam Winchester) and Jensen Ackles (Dean Winchester), it also features a semi-regular cast of recurring characters such as Jeffrey Dean Morgan as John Winchester (Sam and Dean's father), Jim Beaver as Bobby Singer, Samantha Ferris as Ellen Harvelle and Misha Collins as the angel Castiel.

Titles
Supernatural is known for its clever episode titles. Four episodes are named after Led Zeppelin songs: "In My Time of Dying", "Houses of the Holy", "What Is and What Should Never Be" and "When the Levee Breaks".