last week's big revelation — that the TVA workforce is actually made up entirely of Variants, plucked from their timelines and mind-wiped to serve as minions to the Time Keepers — that is the question at the center of 's fourth episode: Who's good? Who's a bastard? And who's in the know about what's actually going on at the TVA?Episode 4, «The Nexus Event,» is hands down the best episode of the series thus far, unexpectedly emotional with a handful of deft action bits and a Marvel-sized wallop