Swamp Thing - Season 1 Episode 21 -

Under pressure from his superior, the shadowy General Sunderland, Arcane experiments with artificial earthquakes when he hires a hot female engineer, named Sienna, to create earthquakes at this latest weapon which leads to a personal conflict between Arcane and Sienna over the test runs, and it also lands Swamp Thing in a bind when he becomes trapped in the underground facility and weakening fast from lack of sunlight. Elsewhere, after Will goes out of town with Dr. Hollister to shop for a new truck, Abigail finds herself helpless when Tressa becomes pinned under the fishing pier during another aftershock and the rising river water threatens to drown her.