Stuart Gordon's 'The Black Cat' is considered by many one of the best (if not the best) episode of of the earlier 'Masters of Horror' series, created by Mick Garris. Now Gordon did it again here, giving us 'hands down' the best episode of Fear Itself. (also created by Garris). 'Eater' is extremely thrilling - it could also be called suspenseful- and shot masterfully. The police station building with the dark corners, locked doors, stairs and corridors makes an ideal 'scenery' while adding a certain 90's feel to the segment (I count that as a plus). Elizabeth Moss's performance as the 'boot' (newly recruited officer) who is being sexually teased by her male co-officers is phenomenal. And those teeeth... (I'm not spoiling anything, just see it for yourself if you haven't) are a pure nightmare!
My only criticism: The ending was a bit too abrupt- 2 more minutes wouldn't have hurt. Still, the episode is definitely worth a watch or two (unlike most of the episodes in the series, unfortunately..)