A note "based on true events" or the like is often a sign of interest for me - then the story does get out of hand, and some aridity at the expense of realism is permissible. As for crime series, it is a plus if I am unaware of tenor and outcomes - then it is catchier to follow. That is why A Confession was largely to my liking - in spite of gloominess and a few scenes outdoors only... And of course, the performances, particularly among the "older" generation: Martin Freeman, Siobhan Finneran, Imelda Staunton... And, as mentioned, I had no idea of the real events, the course had several moments of what´s next? to me, enabling me to address it as a crime story where the result and the guilt of the detainee were revealed in the end. Thus, a real police and court work, no constant chases-shootings, no people with "model face", etc.

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