Olivia Newton-John shows up this week, helping Sue get over a humiliating incident from her past. Molly Shannon also guest stars, while Will is focused on a salacious list that's getting passed around school.
Blaine: I needed you. I needed you around and you weren't there. And I was lonely. And I'm...I'm really sorry. Kurt: You don't think that I've been lonely? You don't think that I've had temptations? But I didn't act on it because I knew what it meant. It meant something horrible and awful.