Wes informs them that he wants to make one last test; how long can Damon last before he attacks his friends to feed on.
Katherine (Nina Dobrev), still pretending to be Elena, tries to get closer to Stefan (Paul Wesley) so they can be back together.
When Caroline (Candice Accola) arrives and tells them about Damon, Stefan wants to find him and Katherine offers to go with him.
Before Stefan and Katherine go, Caroline gets a phone call from Tyler (Michael Trevino) who tells her that he worries about Matt (Zach Roerig), who has vanished for two days, and that Nadia (Olga Fonda) was compelling him.
While there, Enzo calls Stefan to inform him about the situation he and Damon are in but Katherine answers who asks him to text her the address.
Damon chokes at Enzo's blood and Wes appears to tell him that it is because he had travelers put a spell on it.
Damon points to Stefan that "Elena" provoked him to feed on her and then she kicked a stake towards him so he will kill him.
[2] "No Exit" received mixed to negative reviews with many hoping that now that Katherine's secret was revealed, the show will "kick in".
Club gave a B rate to the episode saying that it was a filler episode: "this path to realization [finding out that Katherine is in Elena's body] basically creates a filler episode, a way to move the story to the place it needs to be for the inevitable big confrontation in the future [...] Katherine taking over Elena’s life was an incredibly inspired storyline, and watching it unfold has been delightful, but sooner or later, someone had to figure out what was going on.
[...] All of the awesome, violent, supernatural drama has been replaced with standard who's-sleeping-with-who nonsense, ever since the original vampires got their own show.
"[4] Caroline Preece from Den of Geek gave a negative review saying that season five of the show has been the worst by far.
That’s not what any of us signed up for but, with the Katherine storyline presumably on its way out now that Stefan and Caroline have figured out the deceit and Nadia has a dreaded werewolf bite to contend with, maybe the next half-arsed arc will be better?
"[5] Stephanie Hall from K Site TV said that overall the episode left her a feeling that this was an off week of the show.
While it did bring our heroes a step closer to solving both of these problems, the ways in which it did so were not delivered with as much metaphoric bang as could be hoped.
"[6] Matt Richenthal of TV Fanatic rated the episode with only 1.3/5 saying that it was one boring hour of television and that the writers recycles scenes and stories from previous episodes/seasons.