Obviously real-life events affect the plotlines of a show. Buffy is riddled with them both publicly and privately. So when analysing the show, how of much of these real-life factors should be taken into account? If I criticise the Season 4 Adam arc should I mention that most of it came about due to Lindsay Crouse leaving earlier? Should input from the network, studios, actors, agents, exec producers, advertisers etc be taken on board or brushed aside when looking at the strengths and weaknesses of a particular season?