in a nutshell: there is a huge "muller" device (aka big ball of water) over some city in russia make folks go bananas (homocidal zombies) and jack, irina, sydney, vaughn and nadia go there to shut it down. of course they save the day and in the process kill sophia/yelena and nadia turns into a homocidal zombie. irina gives vaughn her blessing to marry sydney, but reminds him that there can be secrets in a marriage, but not deception. the ep closes with vaughn confessing that his "good guy" status depends on what side youre on and that his name isnt even michael vaughn. ?!