While Sheriff Lucilia Cable (series star JENNIFER BEALS) searches for Alec unsuccessfully, Abby theorizes that it was more than an accident and retrieves his video journals from Daniel Cassidy (special guest star IAN ZIERING). When one of her patients, Susie Coyle (guest star ELLE GRAHAM), escapes from the hospital, Abby and Matt follow her into the swamp. There, Abby encounters Swamp Thing – a creature that Susie later identifies as Alec Holland. While Alec struggles to understand his metamorphosis into the monstrous, plant-based creature, known as Swamp Thing, Avery meets with Jason Woodrue (series regular KEVIN DURAND), the scientist who initially developed the biological accelerant responsible for the “green flu” and orders him to halt the epidemic. And Maria Sunderland reaches out to Madame Xanadu (series star JERYL PRESCOTT) in order to communicate with her dead daughter, Shawna (guest star GIVEN SHARP).