Dr. Samuel Register
DC, The Zookeeper
- Also known as
Appearances
- Teen Titans #14 — 2004-10-00
- Villains United: Infinite Crisis Special #1 — 2006-06-00
- Teen Titans #99 — 2011-10-00
- The Infinite Crisis Omnibus #[nn] — 2012-08-00
- Titans #26 — 2025-10-00
- Titans #27 — 2025-11-00