2.05 - Kill Or Be Killed

Mason earns the moonstone by telling Tyler how his Lockwood vampire curse was triggered in his student days by an accidentally fatal brawl escalation on a spring-break Miami excursion, all orchestrated by Kathryn, but leaves out that he's in league with her. Jeremy becomes mates again with lonely Tyler. The Salvatore brothers get trapped in a forest ruin by the sheriff after Mason convinces her that Damon is a vampire. Caroline exposes herself to save them.

Source: IMdb