Captain Atom (Earth-16) has appeared 14 times in indexed Justice League stories.
| Appeared As | Appeared In | Notes | Portrayed by | |
|---|---|---|---|---|
| 2 | Supporting Cast | Young Justice 1x2 "Fireworks" | First Earth-16 appearance, do not speak. Escorts Blockbuster to prison. | N/A |
| 5 | Supporting Cast | Young Justice 1x5 "Schooled" | In the background. One of the Leaguers who fought Amazo. | N/A |
| 6.5 | Supporting Cast | Young Justice (vol. 2) #9 (Dec 2011) | Serving as the Team's espionage instructor, assigns them the cold case investigation into Nathaniel Adams' murder conviction. He does not tell them that he is Adams. Originally a USAF intelligence officer. Born 30th May, 1940, officially "died" in prison in 1969 after serving less than a year for the murder of General Lemar. | N/A |
| 6.6 | Supporting Cast | Young Justice (vol. 2) #10 (Jan 2012) | Revealed to be Captain Nathaniel Adams. Serving as the Team's espionage instructor, assigns them the cold case investigation into his own murder conviction. Last appeared in Young Justice (vol. 2) #9 (Dec 2011). | N/A |
| 12 | Supporting Cast | Young Justice 1x12 "Homefront" | At the Cave after the Red Tornado vanishes. Does not speak. | N/A |
| 13 | Supporting Cast | Young Justice 1x13 "Alpha Male" | Helping restore the Cave after the Red Torpedo and Red Inferno's attack. | N/A |
| 14 | Supporting Cast | Young Justice 1x14 "Revelations" | Fight the Taipei Vine | N/A |
| 16 | Cameo Appearances | Young Justice 1x16 "Failsafe" | Doppelgänger created inside a telepathic training scenario. Killed during the first wave of the invasion. | N/A |
| 22 | The Justice League | Young Justice 1x22 "Agendas" | At Justice League membership conference. | N/A |
| 25 | Supporting Cast | Young Justice 1x25 "Usual Suspects" | At the induction of the new Justice Leaguers. Taken over by Starro-Tech. | N/A |
| 26 | Supporting Cast | Young Justice 1x26 "Auld Acquaintance" | N/A | |
| 601 | Supporting Cast | Young Justice Invasion 2x1 "Happy New Year" | He is now the Leader of the Justice League. He alerts the Team to Lobo's attack on the UN. He arrives in New Orleans after Gamma Squad have routed the Kroloteans. | N/A |
| 603 | Supporting Cast | Young Justice Invasion 2x3 "Alienated" | Awaiting Zeta Squads report as STAR Labs. | N/A |
| 604 | Cameo Appearances | Young Justice Invasion 2x4 "Salvage" | Onboard the Watchtower watching the Zeta-Beam Shield being deployed. | N/A |