The nickname of Robert McCall (Edward Woodward), a retired US Government espionage operative (supposedly the CIA) turned urban vigilante on the espionage drama THE EQUALIZER/CBS/1985-89.
In an effort to redeem himself for all the things he had done as a spy, McCall assisted the weak or helpless in their struggles against the criminal elements that lurked in the concrete canyons of New York City.
This stylish, over fifty do-gooder advertised his services in a simple newspaper ad which read: “Got A Problem? Odds Against You? Call The Equalizer 212-555-4200.”
McCall screened the calls for help on his apartment telephone answering machine. Those he chose to help, he never charged. He often called on former associates in the spy trade to assist him on his assignments.
See also – “Control“