Most memorable scene...
I stumbled upon this show when it first aired on a cable channel (USA or Sci Fi) in the states. I watched every episode but never really "got" it. It was very high concept (basically a police procedural where the suspects are blood suckers), they explained very little (they famously never say "vampire"), and theres very little action (or horror for that matter). And worst of all for television, the characters were inaccessible. Especially Vaughn Rice, a very thuggish G-man type vampire hunter played by Idris Elba. At the point in the series where the audience is still questioning whether or not these creatures are really a threat to humanity, Rice is killing them without guilt or hesitation, and dislikes the hero played by Jack Davenport.
Eventually there's a storyline involving vampires being smuggled through check-points at airports in time-locked coffins. Vaughn somehow (I can't remember/ its been too long since I saw it) gets locked inside a room full of these coffins set to spring open at sunset. As time rapidly approaches, Vaughn breaks down, calls the woman he has feelings for, hangs up without saying a word, and sticks a gun in his mouth, ready to die. Just he;s a bout to do it, he comes up with a plan and escapes just in the nick of time. Its one helluvay dramatic scene, that made me like this tough, unlikable character, and made me glad I stuck with the show till the end.