C68 Doctor's Guess!

Early the next morning, the Doctor burst into Willett's room, rousing him from his bed and making a beeline for the lab.

"What in the world is happening? It's so early!" Willett mumbled, rubbing his eyes, still not fully awake.

"A huge discovery! A huge discovery!" The Doctor raved, his face alight with excitement.

"Discover your sister!" Willett muttered under his breath