Mike Marts, Mike Carlin, Jeanine Schaefer (assistant), Elisabeth Gehrlein
Characters
Main:
Jimmy Olsen, Mary Marvel (Mary Batson), Pied Piper (Hartley Rathaway), Trickster (Giovanni Giuseppe), Challengers from Beyond: Bob the Monitor, Donna Troy, Kyle Rayner, Jason Todd, Jokester
Heroes:
Wonder Woman (Princess Diana), Black Canary (Dinah Lance), Flash (Wally West), Hawkgirl (Kendra Sanders), Katana (Tatsu Yamashiro), Fire (Beatriz da Costa), Power Girl (Kara Zor-L), Supergirl (Kara Zor-El), Wonder Girl (Cassie Sandsmark), Zatanna, Big Barda, Lady Blackhawk (Zinda Blake), Oracle (Barbara Gordon)
Villains:
Eclipso (Jean Loring), Hassan the Mummy, Klarion, Owlman II, Power Ring, Super-Woman, Ultraman
Countdown was a 52-issue weekly series which premiered with issue #51 and continued backwards, ending with #0 and leading into the Final Crisis crossover event.
Synopsis
Trickster and Piper crash Black Canary’s bachelorette party.