Severance

I had an idea of them finding a way to invert their chips, so the outies are stuck on the severed floor and vice versa. This would force the outies to reckon with the reality of innie life and place the innies and outies in a more directly adversarial position. If oMark and Helena try to leave the severed floor, they'd only be setting iMark and Helly free. Then you could potentially have Gemma on the outside trying to get iMark to let her husband out or other new dynamics they could set up with the innies pretending to be outies full-time.