In the mid-season finale, Alli discovers that Drew cheated on her with Bianca in the boiler room. Clare tries to patch things up between Eli and Fitz. Eli makes it worse by poisoning Fitz's drink. When Clare tries to apologize, she sees that Fitz has a knife and goes to get Eli. The school goes in lock down when Principal Simpson gets wind that someone has a knife. Clare finds Eli in an empty hallway but Fitz arrives. Fitz threatens Eli with a knife but fakes a stab and laughs in his face only to get caught by the police.