Story: "River Run Ch. 4: The Secret of Slaughter Swamp" (24 Pages)

Credits: Mark Miller (plot, script); Phillip Hester (pencils); Kim DeMulder (inks); Richard Starkins/-Comicraft (letters); Tatjana Wood (colors); Stuart Moore (edits)

Feature Character: Swamp Thing

Supporting Character: Anna (as the wife of Laurence Cooper/Black Box; see Comment)

Guest Star: Black Box (Lawrence Cooper; first appearance; a superhero; see Comment)

Villain: Solomon Grundy (first appearance; a counterpart of the DC Universe character in an alternate universe; see Comment)

Other Characters: Michael Cooper (the son of Anna and Laurence; deceased), Mr. Malloy, Harry Shaw, Harold, Maude, Cyrus Gold, Slim Jim Cooper, Drew Fitzpatrick, Jean Hansen (first appearance of all; latter four die; see Comment)

Comment: All characters except Swamp Thing appear as characters from an alternate universe described in Anna's book "River Run". Swamp Thing possesses the body of Solomon Grundy in this story.