I do not ever recall learning the character name of Pete Postlewaite, (for the best considering the prequels) but I think him, Morse and Dillon, you do get familiar with anyway. It is a testament to the acting prowess of the cast that they make paper thin characters feel real with single scenes, like the scissors scene, or the laughter in the tunnels scene for some examples.
I do not necessarily like them, but I do see real humanity.