I have enjoyed all of the episodes I have seen with perhaps the exception of Crouch End, which lost me after about ten minutes. End of The Whole Mess was brilliant -- the direction and the writing were so, so good. Battleground has exquisite acting and I especially liked Road Virus Heads North --I found it mesmerizing, contemplative, and unsettling. It resonated with me far longer than the others I think because it is most like a real nightmare -- the really vivid kind that stays with you. The antagonist is unknown, not immediately indentifiable and unrelenting. I found it subtle and intelligent in its understanding of what is truly scary.