Confronted by Kevin, Lucy chooses Ian over her husband. Marissa sees the pics she stole from Reese, which prove Stephen and his band are vampires, then Reese & Caz try to kill her. Marissa's saved when her late twin Casey appears! Alison & Elizabeth lie to Caleb about Joshua's whereabouts. Elizabeth tells Caleb she's leaving him, but he seduces her. Rafe tells Ali her mother's now a full-fledged vampire because she killed. Rafe disposes of Joshua's dead body. An upset Ali sees Caleb & Elizabeth making love. Rafe reveals he found papers which prove Ali's sibling's a girl, so Rafe can't be her brother! Rafe & Ali joyously reunite.