The Mysterious Max Headroom TV Hijackings
In 1987, unknown hackers hijacked two Chicago television stations to broadcast footage of a person wearing a rubber Max Headroom mask. To this day, the culprits remain unidentified despite a massive federal investigation.
The intruders first interrupted a news broadcast and later took over a science fiction program by overpowering the station's signal. The strange footage featured rhythmic buzzing and a masked figure making cryptic remarks that baffled millions of viewers. Despite the Federal Communications Commission launching an extensive search, no one was ever charged for the sophisticated technical stunt. It remains one of the most famous unsolved mysteries in the history of broadcast engineering.
Source: Max Headroom signal hijackings