While Swamp Thing finds a new way to communicate with Abby, Matt learns the truth about Alec Holland and Avery pressures Woodrue to deliver results.

When her friend and co-worker is stricken with the green flu, Abby searches Alec’s lab for a cure, but instead finds the latest supernatural reanimation from the Rot.

Certain that Alec’s disappearance is more than an accident, Abby and Matt venture into the swamp, where she encounters Swamp Thing. Scientist Jason Woodrue comes to Marais.

Nolan teams up with new night detective Pablo Armstrong for a murder investigation case that results in an unexpected reunion with a former love interest. Officer Bradford reluctantly accepts help…

Mac and Jack partner with older versions of themselves, a Russian bomb programmer and his estranged handler, to shut down a Soviet-era warhead in Moscow. But when the antiquated computer…

Still wrestling with addiction — and an unshakable fright — a frantic Luke tries to save a friend while sensing his twin sister is in danger.