In the TARDIS
"River I need you to trust me" the doctor pleaded
"Of course sweetie, what is it?" she inquired as he paced the TARDIS staring at the watch. He then made a decision. He scanned the watch and the results came up. It was the scientist.
"YES its her its really her" the doctor literally jumped for joy.
"But who is she?" River asked.
"She's another timelord or timelady I guess. She's a lot older than me and a prodigy even among the timelords. She was lost or kidnapped so long ago even I forgot about her. Even before the time war I worked with her in a group of scientists led by her. She was one of our greatest minds then one day she was gone from her house. No sign of teleportation, time travel no trace minerals or anything she just disappeared and left her family her TARDIS was missing too. Scans show she didn't use it but it was gone. Just gone, vanished, disappeared. Inside this watch is the consciousness of The Scientist." He said this all very quickly "we need to get to her and open it"
"Why do you think she disappeared?" River asked
"I don't know," the doctor replied "lets ask her"