[spoilers] what is the best series of spooks

[Belle]

I personnaly liked s7 the best (not at all due to the introduction of Lucas ) I liked the seperate storylines, but I loved the whole sugerhorse-arc; very spyish, if you ask me. And I think Ros was at her best here (along with s8), I do miss her cinical sense of humour! But I also liked the first few seasons with Tom, Zoe and Danny, though it wasn't as fast paced and flashy as now, I liked the down to earth manner in wich the characters were portraited.