Steve/Peter
Since apparently Stephen, as a doctor, was more interested in whatever power trip he was on than the health and safety of a member of his team, Steve decided to get the information from the source, always planning on what they might have to do to ensure that it didn't happen.
He made other switches, moving and working through the ranks of the prisoners until he found the person he needed to. "I have a question. How long can you survive in here without using your powers? I don't mean when it's uncomfortable, but when will your health be seriously compromised based on the food intake and whatever your saving by not using your powers?"