"I stopped worked for UNIT five years ago." Tosh looked up from her laptop a moment, barely meeting the Doctor's eyes before dropping her gaze back to her computer, and the program she'd pulled up. The one she'd created to simulate Rift activity, and predict Rift spikes. "Different parameters," she muttered to herself. "How large is the terminus area? Is it just part of this place, or could the entire place serve as a terminus point for transfer?"