BLACK MASS

Justice League of America #234"Claws"

Earliest catalogued appearances of Black Mass and Nightfall.

Jan 1985

No listings

Justice League of America #235"Heavy Metal"

Earliest catalogued appearance of Overmaster.

Feb 1985

No listings

Justice League of America #236"Gypsy Genius"

Mar 1985

No listings

Justice League America #43"If You Play Your Cards Right ..."

Oct 1990

No listings

Justice League America #44"Pastiche"

Nov 1990

No listings

JLA Secret Files #1

Earliest catalogued appearance of Hourman (Matthew).

Sep 1997

No listings

Joker: Last Laugh #1"Stir Crazy"

Dec 2001

No listings

Joker: Last Laugh #4"Everyone Knows This Is Nowhere"

Dec 2001

No listings

Joker: Last Laugh #2"Siege Mentality"

Earliest catalogued appearance of Orca.

Dec 2001

No listings

Joker: Last Laugh Secret Files #1

Dec 2001

No listings

Joker: Last Laugh #6"You Only Laugh Twice"

Jan 2002

No listings

The Power Company #5"Shadows Linger"

Aug 2002

No listings

The Power Company #8"Power Loss Part One Shot In The Heart"

Nov 2002

No listings

The Power Company #9"Power Loss Part Two Mortal Wounds"

Dec 2002

No listings

The Power Company #13"Saving The World"

Apr 2003

No listings

The Power Company #14"The "Bobo the Kitten" Gambit"

May 2003

No listings

Avengers / JLA #4

May 2004

No listings

Superman/Batman #32"The Enemies Among Us, Part 5"

Feb 2007

No listings

Justice League of America #17"Sanctuary, Part One; "Meanwhile, Back in the Kitchen...""

Earliest catalogued appearance of Doctor Polaris (Nichol).

Mar 2008

No listings

Justice League United Annual #1

Dec 2014

No listings

Justice League United #6

Jan 2015

No listings

Justice League United #7

Feb 2015

No listings