Star Trek: Deep Space Nine: Season 5
Deep Space Nine's fifth season was a turning point from which there was no going back. Character and information overload took over, and the complicated twists and turns in the build up to war either hooked viewers securely, or sent them away with a headache. The Klingon faction instigated by Worf's arrival was occasionally played for laughs, but mostly their hardheaded personalities made all efforts at diplomacy moot. In the opening episode a chilling possibility is proposed as to what might be: have the Changelings infiltrated already and replaced key personnel?