Plot summary
Ryan feels the aftereffects of his late night drinking of having slept with a random woman. He confesses this to Gwen, who leaves him knowing how unstable he has become. He drinks to drown his sorrows. Theo and Penny visit a wealthy yet sadistic resort for killing; the head of which, Eliza, can help them escape but only if Theo kills Ryan. Ryan works together with agent Lisa Campbell to dig into Theo's past and learn that, as a 10 year old, he had someone murder his family. They track the killer down only to discover that his step-sister Sophia (Penny's real name) assisted him, calling Theo a demon. Mark and Daisy track down a hacker to discover Tom's betrayal and reach out for Theo's help. Tom continues to hide his guilt but after agent Sloan discovers his lies, she is inadvertently killed by Tom during a struggle.
Credits
Adapted from Wikipedia contributors, The Following season 3. HTML formatting and reference markers removed.