I swear I remember this show. R.I.P. Edward Woodward 1930-2009, so let this post be a tribute.
The song is an untitled one, so it most definitely is just referred to as “The Equalizer Theme”. However, what’s cool about the song is that it was composed by Stewart Copeland. If who don’t know who he is, shame on you. He is The Police’s drummer. No wonder it is very percussion-y.
Below is said 1-minute opening (don’t you just miss those times?).