Atom (Earth-16) has appeared 6 times in indexed Justice League stories.
| Appeared As | Appeared In | Notes | Portrayed by | |
|---|---|---|---|---|
| 16 | Cameo Appearances | Young Justice 1x16 "Failsafe" | A doppelgänger created inside a telepathic training scenario. Mentioned as dead by Cat Grant. | N/A |
| 22 | Cameo Appearances | Young Justice 1x22 "Agendas" | As a hologram. Considered for membership of the Justice League. | N/A |
| 25 | Supporting Cast | Young Justice 1x25 "Usual Suspects" | Joins the Justice League. His membership card say number #18. Taken over by Starro-Tech. | N/A |
| 26 | Supporting Cast | Young Justice 1x26 "Auld Acquaintance" | N/A | |
| 601 | Cameo Appearances | Young Justice Invasion 2x1 "Happy New Year" | Dr Ray Palmer. Noted by Bumble Bee as her tutor. He arrives in New Orleans after Gamma Squad have routed the Kroloteans. | N/A |
| 603 | Cameo Appearances | Young Justice Invasion 2x3 "Alienated" | Glimpsed in a flashback to “Auld Acquaintance”. | N/A |