S1·E17 Accepting Anxiety Part 2: Can Anxiety Be Good?

Thomas and the Sanders Sides appear on Anxiety's room, which looks just like Thomas' apartment decorated as in a Tim Burton movie, with a clock that moves quickly backwards, spider webs everywhere, posters of "A Nightmare before Christmas" and a curtain with drawn spiders, something that scares Patton to death. At first they don't see him, but soon Anxiety pops up startling them all, a moment when Thomas goes back to normal. Anxiety tells them he has decided to quit, as he didn't thought he was wanted, and even though he only intended to protect Thomas, he has understood that he overdoes it and thinks Thomas will be better without him. Thomas and the others try to convince him to come back, as anxiety, even if unpleasant, is necessary for Thomas' life. But soon something strange starts happening to the Sanders Sides, as they start developing the same eye-shadow and progressively become more and more anxious the more time they spend on Anxiety's room.