Ehh it stretches the definition a bit since she's not stuck in one room, but it's one location and we're with her the entire episode while she's cut off from the ensemble and the main plot. Perhaps it's a canteen episode, if we were to give deference to the fact she does walk around the planet

I love bottle episodes. I don't care if Fitz and Simmons hook up. And I detested this episode with the fiery fury of a thousand Johnny Storms. Based on Simmons' previous behavior I was expecting a harrowing meditation on human resilience or at least the introduction of an interesting threat that team SHIELD needs to…