"Very minor," the Doctor agreed, heading behind Jack and looking over his shoulder. "Barely a power hiccup, but in a place this well-fortified, it shouldn't have happened at all."

He reached across and pressed another button, bringing the layout of the outpost into a hologram in front of them. The Doctor gestured to where the screen indicated.

"A small burst of energy originating here. Could've been nothing, but considering what happens to this outpost not all that long in the future..."