"The Leviathan Conspiracy"
Matt Cable, Abby Arcane and Bolt search for the Swamp Thing, who is busy investigating why the swamp has been generating so many monsters lately. They find him and capture him. To Cable's horror, the military complex turns our hero over to the scientists who intend to study, then terminate him. Cable finds time alone with the Swamp Thing, who proves capable of speech, and relays that he is, in fact, Alec Holland.
Cable makes a plan and busts Swamp Thing out of captivity, destroying the lab, and makes it seem that the Swamp Thing perished in the fire.