Season 1 ends with an unwanted guest returning to the set. Meanwhile, Rachel is betrayed; and Adam makes a decision that changes his life forever.

Olivia continues to cope with the ominous warning from the Observers, while Peter and the team track a girl with the mysterious ability to predict death.

When Trance becomes attracted to a mysterious young man from her past, the reunion causes her to begin regaining her memories.

The crew encounter the Vedrans the long-lost founders of the Commonwealth.

The team finds Lucius Lavin manipulating the people of another hapless planet, using Ancient technology to pose as an invincible hero.

Allison’s baby shower fetches her a load of eco-friendly gifts and the discovery of a drowned scientist in a location where drowning is impossible.

Sam and Dean meet Maggie Stark, a witch who has unleashed her wrath on a small town, resulting in numerous deaths. Sam and Dean track down her husband, Donald, to…