Watch The Vampire Diaries S2E5: Kill or Be Killed Tyler discovers more regarding his Uncle Mason and their family curse, just about the time when Damon and Stefan is having an argument on how to handle the Lockwoods. Jeremy hangs out with Tyler in order to learn more about the Lockwood mystery even though Elena has warned him about doing it. Mason gives Sheriff Forbes some unexpected news that led to a wild evening. The new installment of our favorite teen vampires in The Vampire Diaries, which is entitled “Kill or Be Killed” is the hit sci-fi drama TV series’ 5th episode of the 2nd season that aired last 10/07/2010 Thursday 8:00 PM on CW.