In the season three finale, Marty, O'Dell, Russo, Diana and Xander embark on a mission to return the goddess Sus to the Realm of Monsters.

Dr. O'Dell gives Marty and Diana a crash-course in Angelology. Xander encounters a familiar face after arriving at the PRAG Campus.

Diana Harris recalls the day of her arrival in 2016; meanwhile, Garth Allen Gibson (now deceased) and Theodore Shankman, Jr. relate to Marty what it was like in Evanston the day after Diana disappeared.

Marty attempts to re-enter The Muddy Place; Xander finds himself in the midst of a monster attack.

Alexander Carter visits The Man in the Smoking Jacket.

Alexander Carter interviews Katherine Tiller; Marty and Claire pitch their idea to Dr. O'Dell.

Claire Connors attempts to convince Marty to get high in order to commune with the Pagan Goddess Sus.

Marty reaches out to Claire Connors, whose motives become clearer in the wake of the raid... And don't forget, Diana's Monster is on Instagram, Facebook, and Twitter!

Claire Connors delves into the origins of the group known as PRAG; Doctor O'Dell provides insight into Marty and Xander's whereabouts... Diana's Monster is now on Twitter! Follow along and share your theories, questions, and more!

Claire Connors launches an investigation into the Paranormal Research Advocacy Group, aka PRAG. Don't forget to follow Diana's Monster on Twitter, Instagram and Facebook.

In the season two finale, Xander travels to The Muddy Place as the ceremony begins.