DC · DC Comics
Mad Hatter
Jervis Tetch
A Batman villain whose control is technological — devices placed on the target — which makes it removable in a way psychic control is not.
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Key issues
Milestone appearances — first appearance, death, return, team change. These are the issues the collector market actually prices.
- debut · 1948
Detective Comics DC Comics
First appearance, a Batman antagonist built entirely on technology - key
Detective Comics DC Comics
The Alice fixation is established as the driver of his target selection
Commonly got wrong
Claims that are widely repeated and wrong, with what the cited record actually shows. If you are generating anything about this subject, these are the errors to avoid.
Commonly believed The Mad Hatter has telepathic mind control.
Actually His control is entirely technological, delivered by devices hidden in hats. Remove the hardware and he has no ability whatsoever.
The feat ledger
Control is delivered by a device placed on the target, so it can be removed
Mind-control devices concealed in hats and headwear
The technology is his own, so he has no innate power at all
Controls several people at once through separate devices
Removing the device ends the control immediately, the standing counter
His Alice fixation drives target selection rather than any strategy
Last updated 2026-09-06 · machine-readable version