Investigating Angel

Angel, Wes, Lorne, Spike and Gunn join together for their biggest battle ever, and for one of them, it will be his last. 

The gang starts to have doubts about Angel's loyalties when he appears to have become very close with the Circle of the Black Thorn, a secret demon society.

Angel, Spike and Gunn track down Lindsay, hoping he has information on the senior partners' plans; a nearly invincible stranger infiltrates Wolfram & Hart looking for Eve.