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.