S1 • E1
After collecting Innocence, Allen and the other Exorcists are headed to the Black Order's new Headquarters, where Director Rouvelier and Allen's Master, Cross Marian, await Allen's arrival.
S1 • E2
Allen and the others are sent to Paris to investigate Phantom Thief G, who is believed to have something to do with Innocence. Once there, they find the thief, whom they discover is also being sought by another party.
S1 • E3
While Allen, Kanda, and Marie are fighting Akuma inside Hearst Orphanage, Timothy awakens as a new Innocence Accommodator. Meanwhile, Reever and the others try to enter the building, but they are hindered by an enveloping barrier.
S1 • E4
North American Branch Chief Renny Epstain pays a visit to Komui to let him know that, by order of the Pope, she is activating the Black Order's new fighting power, the Third Exorcists. Meanwhile, the last Noah member awakens.
S1 • E5
Some of the Black Order's staff are brought into the North American Branch to observe Alma Karma, the parent body of the Third apostles. However, during the meeting, the branch is attacked and comes under the Noah clan's control.
S1 • E6
Kanda's memories show the time 9 years ago when Kanda (then called Yu) and Alma were children and were "Second Exorcists" living in the Sixth Laboratory of the Black Order's Asian Branch. Overseen by then North American Branch Head Sahlins Epstain (Renny's father), and then Asian Branch Head Twi Chan and her assistant Edgar (Bak's parents), they were forced to go through harsh synchronizing tests with Innocence daily, repeating the cycle of dying and regenerating. Even through their ordeals and their very different characters, Yu and Alma become best friends. However, Yu starts having hallucinations of a woman near a lotus pond, which Alma mistaken as Fo. As a result of the hallucinations, Sahlins and Twi decided to euthanize Yu. Alma attempts to help Yu escape, but Yu is taken back to the laboratory to be sealed, though not before he chances upon the recently blinded Noise Marie and young Bak Chan. Yu realizes that his hallucinations are memories of his past life, including seeing the woman he loves and that he was once an Exorcist killed by an Akuma. Alma tries to save Yu again, this time by synchronizing with his Innocence for good. Road then reveals to Allen that the "Second Exorcists" are artificial humans created by planting the brains of dead Exorcists in new, regenerative bodies to ensure their synchronization with Innocence.
S1 • E7
While in Kanda's memories, Allen sees what the Black Order was doing to Kanda and Alma Karma in the name of the Second Exorcist Plan nine years ago, and how Kanda ended up killing Alma Karma.
S1 • E8
As Alma Karma finally wakes, the Alma cells that were implanted in the Third Exorcists start to go out of control. When the situation becomes desperate, the Millennium Earl makes Allen an offer.
S1 • E9
After the Hekiji barrier placed on the North American Branch is canceled, Allen sees the soul of Alma Karma, who became an Akuma, and learns why Alma has been trying to kill Kanda.
S1 • E10
The Third Exorcist Tokusa continues to mutate and attacks Allen. To protect Tokusa, Tewaku also mutates and tries to attack Allen, only to be repelled by Timcanpy who has grown huge. The Earl states that he will not allow the Order to break the rules and fight with his own weapons. He and the Noah then leave, taking the remaining Third Exorcists with them. Allen and Timcanpy are then shackled and imprisoned for enabling Kanda and Alma to escape. The Noah try to understand why the Earl is so affected by the 14th that he cried himself to sleep. Sheril holds Lavi hostage to force Bookman to reveal information about the 14th. Link reports to the Vatican about the Noah attack, also stating that Allen is not eating and refusing to lead them to Kanda and Alma. Head chef Jerry tries to cheer up the Exorcists and scientists in the canteen by preparing a delicious feast but they are more worried about Allen. Link takes food to Allen in his cell and tells Allen about the guilt he feels because of his past friendship with the Thirds, and his role in their transformation. Allen starts turning into the 14th just as a suspicious Cardinal comes in and promises to "heal" him.
S1 • E11
When the Cardinal attacks Link, Allen, still in a daze and fearing for Link's life, instinctively uses his Innocence on the Cardinal.
S1 • E12
Now that the Order considers Allen a Noah, Komui issues an order for Exorcists and CROWS to capture him. However, Lenalee believes that Allen won't betray them and goes after him on her own.
S1 • E13
Three months after Allen`s desertion from the Order, some still believe in him and others harbor doubts. When Lenalee expresses disappointment at being unable to help Allen, Marie reassures her that their bond with him remains intact.
Road Kamelot
Lavi
Lulu Bell
Allen Walker
Bookman
Aleyster Crowley
Lenalee Lee
Sennen Hakushaku
Cross Marian
Komui Lee