Jeff has a tech friend, E.J., trace Nate's phone call on the night of his disappearance. Meanwhile, Skye expresses her concerns to associate producer Peter Grey, who is less than concerned. and on the show within in a show, Billy tries to help Kelly solve a murder with connections to The Blood, his "family" of followers.
Jeff meets his brother's girlfriend, college student Laura, and learns that a new craze sweeping the nation: Being Billy, a game where students recreate scenes from the series. When one recreation leads to murder and Jeff learns that Nate ran the game, he wonders if his brother is a killer.
Skye collapses from the aftereffects of the hallucinogenic and the doctors soon confirm that she will die if they don't obtain a sample. Jeff sets out to get a sample from Detective Sakelik with the help of a friend. Meanwhile, Skye confronts figures from her part and present as she tries to determine what is real and what isn't.
Jeff and Skye look into Sakelik's past and trace her to a mysterious house. There they encounter a woman, Annabelle, who holds the key to Sakelik's past. Meanwhile, Sakelik visits a friend and seeks redemption.
A former initiate gives Jeff and Skye the information they need to let Skye infiltrate a gathering of new recruits for the True Believers. However, Jeff soon loses her trail only to make some startling discoveries of his own. Meanwhile, on the show, Andy is abducted and Kelly suspects that Billy is responsible.
Songs: How to Destroy Angels -- Keep It Together
Skye discovers that one of the actresses on Cult has ties to the Moon Hill children, and the trail leads her and Jeff to a church dedicated to television. Meanwhile, Stuart asks Roger for a favor, leading Roger to a shocking discovery. And on the show, Billy pens his magnum opus while his sanity cracks.
Phillip's book leads Skye and Jeff to the missing Professor Robert Kimble. His assistant Allegra provides them with clues to the secret of neural interface, and they soon make contact with Kimble and learn of his connection to the Moon Hill parents. Meanwhile, Roger confronts Kirstie and on the show, Kelly goes to therapy with her sister Meadow.
Jeff trades the location of the Moon Hill parents to Stuart in return for Nate, reuniting the two brothers at last. The Moon Hill children disband after discovering the fate of their parents, but Stuart vows to continue the search for his father... and joins forces with Jeff, Skye, and Nate to learn the truth. Meanwhile, in a live webcast broadcast, Billy and Kelly have their final confrontation and Kelly must make an impossible choice.