| Issue | #DC-21 |
| Published | October 1973 |
| Cover Price | 0.50 |
| Pages | 100 |
| Editing | E. Nelson Bridwell |
| Pencils | Nick Cardy |
| Inks | Nick Cardy |
| Characters | Superboy; Superboy Revenge Squad |
| Genre | superhero |
| Script | Robert Bernstein |
| Pencils | George Papp |
| Inks | George Papp |
| Reprinted | from Superboy (DC, 1949 series) #94 (January 1962) |
| Characters | Supergirl; Lena Thorul |
| Genre | superhero |
| Script | Leo Dorfman |
| Pencils | Jim Mooney |
| Inks | Jim Mooney |
| Reprinted | from Action Comics (DC, 1938 series) #313 (June 1964) |
| Characters | Superboy |
| Genre | superhero |
| Script | Bill Finger |
| Pencils | John Sikela; Win Mortimer (page 1) |
| Inks | John Sikela, Win Mortimer (page 1) |
| Reprinted | from Adventure Comics (DC, 1938 series) #117 (June 1947) |
| Characters | Kid Eternity; The Beagle (intro, villain); Joe Hodges (intro, death); Mercury (guest star), Richard Harding Davis (guest star), Cyrano De Bergerac (guest star) |
| Genre | superhero; occult |
| Script | William Woolfolk |
| Pencils | Pete Riss |
| Inks | Pete Riss |
| Reprinted | from Kid Eternity (Quality Comics, 1946 series) #9 (Spring 1948) |
| Characters | Brainiac 5; Colossal Boy; Lightning Lad; Saturn Girl; Sun Boy; Superboy; Ultra Boy (all as the Legion of Super-Heroes); green kryptonite |
| Genre | superhero |
| Script | Edmond Hamilton |
| Pencils | John Forte |
| Inks | George Klein |
| Reprinted | from Adventure Comics (DC, 1938 series) #332 (May 1965) |
| Characters | Kid Flash; Robin; Aqualad; Mr. Twister (villain) |
| Script | Bob Haney |
| Pencils | Bruno Premiani |
| Inks | Sheldon Moldoff |
| Reprinted | from Brave and the Bold, The (DC, 1955 series) #54 (June-July 1964) |
| Characters | Superboy |
| Genre | superhero |
| Script | Otto Binder |
| Pencils | Curt Swan |
| Inks | John Giunta ? |
| Notes | inker id by Bob Hughes 3/09 |
| Reprinted | from Superboy (DC, 1949 series) #50 (July 1956) |
| Pencils | Jack Burnley |
| Inks | George Roussos |
| Reprinted | from Adventure Comics (DC, 1938 series) #117 (June 1947) |
| Pencils | Al Bryant (?) |
| Inks | Al Bryant (?) |
| Reprinted | from Kid Eternity (Quality Comics, 1946 series) #9 (Spring 1948) |
| Characters | Robin [Dick Grayson]; Kid Flash [Wally West]; Aqualad [Garth]; Mr. Twister [Brom Stikk] |
| Genre | Superhero |
| Pencils | Bruno Premiani |
| Inks | Bruno Premiani |
| Reprinted | from Brave and the Bold, The (DC, 1955 series) #54 (June-July 1964) |
| Genre | Superhero |
| Pencils | Curt Swan |
| Inks | George Klein |
| Reprinted | from Adventure Comics (DC, 1938 series) #332 (May 1965) |