Unfortunately, getting hold of the original TV intro is very difficult indeed. But after much searching, a zipped MP3 file of the theme song can now be downloaded from here--> http://www.theprofessionalstheme.cjb.net

And for true die hard fans, you can check out the ONLY official and authorised website based on 'The Professionals' by clicking here-->
http://www.personal.u-net.com/~carnfort/Professionals/