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    Challengers of the Unknown #84 (D.C. Comics, 1978). 12/1977-1/1978 - Swamp Thing & Deadman appearance. Deadman is sent to help heal the still ailing Prof Haley. When he revives; he insists that the Challengers try to help cure the Swamp Thing for all his help.; The Challengers return to Perdition; PA; but find no trace of the Swamp Thing. Deadman; taking possession of Ace reveals to the Challengers that the Swamp Thing is in fact in Philadelphia now - and he's in trouble! Gerry Conway story, Keith Giffen and John Celardo art, Rich Buckler and Joe Rubinstein cover.

    Publisher: DC
    Category: Universal
    Page Quality: White
    Pedigree: Don Rosa Collection
    Artists/Writers: Gerry Conway story Keith Giffen & John Celardo art Rich Buckler & Joe Rubinstein cover
    Significance: Swamp Thing & Deadman appearance.
    CGC census 5/20: 5 in 9.6, 4 higher.

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