"It wouldn't surprise me if they placed more rules upon us as time went by, but I suspect 'don't ask what happened' would be the most suspicious of them that perhaps they're hoping to avoid making it an actual rule." It made sense, really. And it was also possible to simply say they didn't know, if they were asked.

The Doctor shrugged. "If nothing's been figured out before they let us leave, there are always tests that can be performed on the land and air." He really was curious about what had happened. And as a scientist, that would be right up William Olsen's ally. "Can't say for sure that they'd answer questions, but it would be a place to start."