Watch Full Episode at: http://www.watchingvampirediaries.com Stefan takes more dramatic actions as he tries to discover the truth behind why Katherine has returned to Mystic Falls, and he is stunned when Katherine reveals some new information about the events that unfolded in 1864. Damon tries a using new method to resolve his issues with Mason, but his decision has serious consequences. Tyler pressures Mason to tell him the truth about the Lockwood family. Stefan and Elena are face limited options when Katherine gives them an ultimatum.