The episode was written by Kevin Williamson and Julie Plec and directed by Marcos Siega.
He follows her to her home to promise he will not hurt her and he lets her know that he drinks animal blood and it was Damon (Ian Somerhalder) who killed all those people.
Damon is at the cemetery trying to cover his tracks after killing Vicki's (Kayla Ewell) friends.
Stefan answers her questions referring to vampires but she is mad at how he let Damon play with Caroline (Candice Accola) like that.
Sheriff Forbes (Marguerite MacIntyre) and Logan (Chris Johnson) find the bodies and they know that what killed them was a vampire.
Back in the present, Stefan tells Elena that Katherine chose him to escort her at the Founder's Ball.
Damon tells her that she is dead since he killed her and he informs her that now she only has to feed on a human to complete the transition to become a vampire.
Jeremy thinks she is high and because of her strange behavior, he calls Matt (Zach Roerig).
Elena promises that she will not tell anyone about him being a vampire but not wanting to deal with the drama, she breaks up with him and the episode ends with her crying inside her house.
Lauren Attaway from Star Pulse gave the episode a B+ rate saying that it excelled because the series reached to a turning point.
She closes her review with: "Overall, “Lost Girls” is visual, exciting, and multi-layered, an episode that makes the audience want to know more about the characters and to tune in to discover what happens next.
"[5] Matt Richenthal of TV Fanatic stated: "From Elena discovering the Salvatore secret, to Vicki transitioning into a vampire, "Lost Girls" was the most significant episode of this CW hit to date.
"In the best episode yet, truths are told, vampires are made, people die AND Ian Somerhalder dances around the living room with his shirt unbuttoned – what more can you ask for?
"[7] Popsugar from Buzzsugar gave a good review to the episode saying that it was one of her favorites because of the action and the flashbacks.
Their slow dance scene is actually pretty cute, too; until, well, Damon breaks Vicki's neck.
"[8] Lucia of Heroine TV congratulates the creators (Siega, Williamson and Plec) of this stellar episode.