If you specifically meant S1E15, this episode focuses on the mystery of Elena's birth mother and the fallout of the tomb opening.
In The Vampire Diaries , is widely considered one of the series' most pivotal episodes, though it is technically Season 2, Episode 7 , not Season 1. If you are looking for the 15th episode of Season 1, that is titled " A Few Good Men " . Season 2, Episode 7: "Masquerade" [S1E15] Masquerade
Stefan and Damon orchestrate "Operation: Kill Kat" at the Lockwood Masquerade Ball. They recruit Bonnie, Jeremy, Alaric, and Caroline to help trap and assassinate Katherine. If you specifically meant S1E15, this episode focuses