| COSMIC BOY (Rokk Krinn) | CHRONOLOGY |
| Created by Otto Binder and Al Plastino |
CHRONOLOGY
Cosmic Boy first appeared in Legion of Super-Heroes Vol. 7 #1 (November 2011). First historical appearance was in Adventure Comics Vol. 1 #247 (April 1958).
Below is the definitive list of appearances of Cosmic Boy in chronological order. Flashback sequences or story entries will be followed by a [Flashback] note. Stories that for some reason are no longer part of current continuity will have a comment saying this in a note following the entry.
Follow the links for a complete index of the issue, including story and creator info as well as full character chronology and in some cases story synopses.
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Cosmic Boy Chronology
| Click to list by alphabetically by title |
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| Legion: Secret Origin #1 (December 2011): "From the Wreckage" |
| Legion: Secret Origin #2 (January 2012): "Target" |
| Legion: Secret Origin #3 (February 2012): "Connections" |
| Legion: Secret Origin #4 (March 2012): "Coming Together" |
| Legion: Secret Origin #5 (April 2012): "Time" |
| Action Comics Vol. 2 #6 (April 2012): "When Superman Learned to Fly" [Flashback] |
| Legion: Secret Origin #6 (May 2012): "Time and Again" |
| Legion of Super-Heroes Vol. 7 #0 (November 2012): "Brainiac's Original Sin" [In between pages 16 & 17 of Legion: Secret Origin #6] |
| Legion of Super-Heroes Vol. 7 #1 (November 2011): "Renegade World" |
| Legion of Super-Heroes Vol. 7 #2 (December 2011): "Hostile World" |
| Legion of Super-Heroes Vol. 7 #3 (January 2012): "Shadow War" |
| Legion of Super-Heroes Vol. 7 #4 (February 2012): "Not What They Seem?" |
| Legion of Super-Heroes Vol. 7 #5 (March 2012): "One Day, A Thousand Years from Now..." |
| Legion of Super-Heroes Vol. 7 #8/2 (June 2012): "Founders' Night" |
| Legion of Super-Heroes Vol. 7 #9 (July 2012): "Capture" |
| Legion of Super-Heroes Vol. 7 #10 (August 2012): "Choices" |
| Legion of Super-Heroes Vol. 7 #11 (September 2012): "Betrayal" |
| Legion of Super-Heroes Vol. 7 #12 (October 2012): "Cataclysm" |
| Legion of Super-Heroes Vol. 7 #13 (December 2012): "Questions" |
| Legion of Super-Heroes Vol. 7 #14 (January 2013): "Overwhelmed" |
| Legion of Super-Heroes Vol. 7 #15 (February 2013): "Once Upon a Dream" |
| Legion of Super-Heroes Vol. 7 #16 (March 2013): "Choose Wisely" |
| Action Comics Vol. 2 #5 (March 2012): "Rocket Song" |
| Action Comics Vol. 2 #6 (April 2012): "When Superman Learned to Fly" |