It happened on this date, November 22, in 1987.  The broadcast signals of two Chicago television stations were hijacked by someone wearing a 'Max Headroom' outfit.

Both incidents happened late in the evening.  First hit was WGN, Channel 9, during the late news.  Later the hijacker struck on Chicagoland's PBS affiliate, WTTV.

The perpetrators of the hijack have never been caught or identified.