| Baron Constantine | |
 | |
| Played by Jack Colvin | |
| Appearances | |
| BW | "Kill Oscar" |
Representing a clandestine organization, Baron Constantine surveys the work of Dr. Franklin, the mastermind they've commissioned to develop and execute a plan to steal the latest OSI invention: a top secret weather control device.
Despite being introduced as a major villain in the "Kill Oscar" trilogy, the character vanishes from the narrative after the first chapter.