The Wire series 3 (actually ended up having a sicky the day after as I stayed up through the night watching that series, on a sort of auto pilot, had to know what happened!!)
Peaky Blinders - series 1 (Really liked how both the first 2 series ended, its back on tonight!!)
Breaking Bad - series 4 (series 3 and 4 finish really well, but "I won" at the end of 4 clinches it for me)