Mr. Esper was a former con-artist who worked at the Black Cat nightclub. Esper tried to start a criminal career in Gotham City and for this purpose, he created a device that could induce people to act strangely by following his commands. He used it to throw off Batman and Robin from the trail of his crimes, but he left evidence behind that helped the crime fighters capture him and his accomplices.
Esper was later contacted by the West Coast Crime Syndicate, who asked him to mentally lure Batman into deadly traps, created by the Syndicate in order to take over Gotham. Esper accepted the Syndicate's task, but he couldn't allow them to kill Batman and for this reason, he forced Penguin to organize and gather various criminals from Gotham and create the Gangland Guardians. Esper used his mental abilities to give Penguin the information needed without revealing his identity and once the threat of the Crime Syndicate was removed, Esper used his ability again, to dissolve the Gangland Guardians.
Esper then became part of a criminal group that planned to steal the Gotham's National Bank. Using special machines, Esper managed to induce subliminal messages into the minds of Batman, Robin and Commissioner Gordon, allowing the crooks to perform their activities without the risk of being captured. However, Batman deduced Esper's scheme and used earplugs to avoid being affected by the subliminal messages and the Dynamic Duo managed to capture Esper once again.
- Telepathy: Esper's telepathic powers are limited to create urgent needs and provide information on others' minds.
- Although this character was originally introduced during DC's Earth-One era of publication, their existence following the events of the 1985–86 limited series Crisis on Infinite Earths remains intact. However, some elements of the character's Pre-Crisis history may have been altered or removed for Post-Crisis New Earth continuity, and should be considered apocryphal.
- 8 Appearances of Mister Esper (New Earth)
- 2 Images featuring Mister Esper (New Earth)
- Quotations by or about Mister Esper (New Earth)
- Character Gallery: Mister Esper (New Earth)
- Mister Esper/Captain Calamity article at Titanstower.com
- Mister Esper/Captain Calamity bio at the Unofficial Guide to the DC Universe
This character is or was primarily an enemy of the Teen Titans, the Titans, or any of the other various Titans incarnations. This template will categorize articles that include it into the "Titans Villains" category.