There are many poor reviews for this programme and everyone is entitled to their opinion. If you want action this is not for you. On the other hand if you want a believable plot full of tension about a man at the end of his tether then I recommend it. Both principal actors Sean Pertwee and especially Robert Glenister give wonderful performances in this superbly written drama about an ex teacher who is now driving a cab for a living. We don't know why he lost his job but it has deeply affected him. He finds comfort and support when he calls the Night Caller radio call-in programme. Gradually his problems are revealed but his troubles increase.