The creature shut its eyes quickly until it was a moving mass again. The tips of its tentacles glowed as it, one would assume, processed Jack's request. There was a screech, and the Doctor winced.

"We will watch and protect until our resources on the moon wear out," the Doctor translated. "That will be----"

Oh. He took a breath and whispered. "Timey-wimey indeed."

He looked over to Jack. "Four years."