Claire is not a happy camper in episode 105 Rent.
She is struggling internally and on the surface. Her agitation increases throughout the episode. She wants to escape so badly, but cannot see the way back to the stones.
She feels every bit the outsider, the Sassenach.
Toward the end she gains an understanding that further challenges her, but her mood begins to alter as she sees a potential role she can play in the future because of her knowledge.