Cassie and Diana team up with dark magic on The Secret Circle finale.

Faye is being held captive by Eben in exchange for a crystal.

The circle and the parents both struggle with the decision to work with Blackwell.

Blackwell, Cassie and Diana create the skull with the crystals.

The circle is broken and their individual powers are restored.

Faye calls Dawn for help, and Dawn and Charles learn they're powers were destroyed 16 years ago.

Charles mother decides to give her powers to Charles and Dawn.

Jake and Melissa go after Faye.

Adam goes back for Cassie and Diana.

Blackwell shows his true colors.

Blackwell wants to kill every witch without Balcoin blood.

Charles gives his life to save Faye, Jake and Melissa.

Blackwell reveals he has four other children in other circles across the country.

Cassie and Diana together are more powerful than Blackwell.

Diana decides to leave town with Grant.