| Issue | #621 |
| Published | October 11, 1988 |
| Cover Price | 1.50 USD; 2.00 CAD |
| Pages | 52 |
| Editing | Mike Gold (series); Brian Augustyn (associate) |
| Notes | Contains 6 stories. Substantial indexing information on this issue provided by Donald Dale Milne. |
| Characters | Blackhawk [Janos Prohaska]; unamed army personnel |
| Genre | Adventure; War |
| Pencils | Joe Orlando (signed) |
| Inks | Joe Orlando (signed) |
| Editing | Robert Greenberger (cover) |
| Notes | Cover artist listed in Action Comics Weekly 620. |
| Characters | Green Lantern [Hal Jordan]; Dex; Hawk; Chip; Al |
| Synopsis | Hal Jordan saves an alien space ship, begins his new job, and his power battery is destroyed when he charges his ring. |
| Genre | Superhero |
| Script | James Owsley [Christopher Priest] (co-plotter); Mark Bright [M.D. Bright] (co-plotter) |
| Pencils | Mark Bright [M.D. Bright] |
| Inks | Jose Marzan Jr. |
| Colors | Anthony Tollin |
| Letters | Albert DeGuzman |
| Editing | Dennis O'Neil (story); Dan Raspler (assistant) |
| Notes | Continued in Action Comics Weekly 622. There is a gap in time between this and the previous story in Action Comics Weekly 620: this is likely the time where Green Lantern's involvement in Invasion occurs. |
| Reprinted | in Justice League [Lega della Giustizia] (Play Press, 1990 series) #3 |
| Characters | Wild Dog [Jack Wheeler]; Wild Pup [Daniel Crown]; Lt. Andy Flint; Lou Godder; Nigel; unamed female serial killer |
| Synopsis | Wild Dog tracks down a serial killer and stops her, but Wild Pup gets injured when he helps. |
| Genre | Adventure |
| Script | Max Collins |
| Pencils | Dick Rockwell; Terry Beatty (layouts) |
| Inks | John Nyberg |
| Colors | Carl Gafford |
| Letters | Tim Harkins |
| Editing | Brian Augustyn (story) |
| Notes | Continued from Action Comics Weekly 620, continued in Action Comics Weekly 622. |
| Characters | second Secret Six [Tony Mantegna; Mitch Hoberman; Vic Sommers; Luke McKendrick; Ladonna Jameal; Dr. Maria Verdugo]; Billy Abrahams; Shelley; Mr. Peterson; Steve Traeger; Gus Markesson; Lurene; Walter Fenady |
| Synopsis | The Secret Six tracks Mockingbird as "The Agency" tracks them. |
| Genre | Superhero |
| Script | Martin Pasko |
| Pencils | Frank Springer |
| Inks | Frank McLaughlin |
| Colors | Carl Gafford |
| Letters | Albert DeGuzman |
| Editing | Robert Greenberger (story) |
| Notes | Continued from Action Comics Weekly 620, continued in Action Comics Weekly 622. |
| Characters | Superman [Kal-El aka. Clark Kent]; Bob Galt; Skud; Zippo |
| Synopsis | Superman saves Bob Galt from some muggers. |
| Genre | Superhero |
| Script | Roger Stern |
| Pencils | Curt Swan |
| Inks | Murphy Anderson |
| Colors | Tom Ziuko |
| Letters | Bill Oakley |
| Editing | Mike Carlin (story) |
| Notes | Continued from Action Comics Weekly 620, continued in Action Comics Weekly 622. |
| Characters | Deadman [Boston Brand]; Wellman Legros; zombies; Madame Waxahachie (first name given as both Molly and Mabel); Clara; Letrita Brogden; Lisa Brogden; spirit of Stella Peckshaw; spirit of Delia Peckshaw |
| Synopsis | Deadman and Madame Waxahachie continue searching for the Peckshaw twins, who have escaped with their zombie army. |
| Genre | Occult |
| Script | Mike Baron |
| Pencils | Kelley Jones |
| Inks | Tony DeZuniga; Pablo Marcos |
| Colors | Daniel Vozzo |
| Letters | Albert DeGuzman |
| Editing | Barbara Kesel [Barbara Randall] (story) |
| Notes | Continued from Action Comics Weekly 620, continued in Action Comics Weekly 623. |
| Characters | Blackhawk [Janos Prohaska]; Andre Blanc-Dumont; Chuck Sirianni; Olaf Friedriksen; Weng Chan; Marcia Rossiter [aka. Alice Richardson]; Steve Claiborne [aka. Leslie Richardson]; Johannes Van Der Houten; Johannes Van Der Houten's army; Mr. Kustarto; Mr. Soek |
| Synopsis | The Blackhawks begin to escape from Van Der Houten as he decides to discontinue his search for the missing plane. |
| Genre | Adventure; War |
| Script | Martin Pasko |
| Pencils | Rick Burchett |
| Inks | Rick Burchett |
| Colors | Tom Ziuko |
| Letters | Steve Haynie |
| Editing | Mike Gold (story) |
| Notes | Continued from Action Comics Weekly 620, continued in Action Comics Weekly 622. |