In the series finale, Angel and the gang prepare for the fight of their lives as they prepare to take on the entire organization of The Circle of the Black Thorn.
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, an evil secret demon society. When Drogyn, the guardian of the deep well, makes a startling revelation, the gangs’ fears that Angel has become evil seem to be validated.
Angel and Spike decide to take a trip to Rome, Italy when they learn that The Immortal, an enemy of theirs, is having relations with Buffy. While on their journey, they get caught up in a struggle between demon clan leaders.
When Illyria’s powers become unstable and cause her to erratically jump through time, she learns that the gang intends to kill her. Upon returning to the present, Illyria plans to murder everyone before they’re able to attack her. To save everyone’s lives, Angel goes into the past with Illyria to alter the course of events.
Angel resists the appeal of parents seeking help from Wolfram & Hart regarding their son’s supernatural abilities after he discovers that the boy is his son, Connor. Despite his reservations, Angel is forced to bring Connor into conflict with an old adversary to prevent his son’s memories from being restored. Meanwhile Wesley uncovers a mysterious deal struck by Wolfram & Hart that threatens the secret Angel desperately wants to protect.
Hoping that Lindsay has information on the Senior Partners’ ultimate plans, Angel, Spike and Gunn track him down in a bizarre and terrifying suburban hell. Meanwhile, a nearly invincible stranger sent by the Senior Partners infiltrates Wolfram & Hart looking for Eve.
Angel and Spike return from England defeated, knowing that the ancient demon Illyria has completely taken over Fred’s body and soul. Upon learning that Knox and Gunn have each contributed to her demise, Wesley goes for revenge and Angel tries everything to restore Fred, including calling on an old friend from Sunnydale. Meanwhile, Illyria tries to locate an ancient temple where she believes she will find an army ready to help her destroy mankind.
When a mysterious sarcophagus is delivered to Wolfram and Hart, Fred accidentally opens it and releases a ancient powerful demon called Illyria. Now with only 24 hours left to live before the demon consumes her, Angel and the gang must figure out a way to save her before its too late.
When a popular children’s show begins to steal the life forces of children by hypnotizing them, Angel goes directly to the studio to uncover the evil doings. Upon entering the building, Angel triggers a spell that transforms him into a puppet. In a race against time, puppet-Angel and company must find a way to reverse the spell, save the lives of hundreds of children and return Angel to his normal vampire state. Meanwhile, Nina, the werewolf Angel befriended, returns to declare her romantic intentions, but puppet-Angel is too embarrassed to reciprocate.
Lawson, a mysterious man from Angel’s past, arrives at Wolfram & Hart and takes the gang hostage. Through flashbacks to World War II, it is revealed that Angel worked with the U.S. Navy to recover a captured German submarine with American sailors on board. The ship also has a secret cargo, a dangerous trio of vampires, including Spike, who were kidnapped by the Germans and forced to help the Nazis. When the sub comes under attack, Angel saves Lawson’s life by turning him into a vampire. Now, sixty years later, Lawson has arrived at Wolfram & Hart seeking revenge.