When Hanner failed to show up at the library at the usual time Barbara tracked him down as Batgirl and discovered he'd been kidnapped and separated from his insulin. After saving his and his sister's lives she approached him as Barbara Gordon and the two of them went on a date where they went ice skating in the park and had dinner at the Tavern in the Green.
- 2 Appearances of Mark Hanner (Earth-One)
- 1 Images featuring Mark Hanner (Earth-One)
- Quotations by or about Mark Hanner (Earth-One)
- Character Gallery: Mark Hanner (Earth-One)