The man
"The Doctor and Meg have left the TARDIS." The man reported watching the pair from the security footage. He was in a room mere feet from them.
"Focus. I don't want the TARDIS tampered with until I am ready."
The man frowned, unused to being bossed about. He was her lapdog only so long as he got ten uninterrupted minutes alone with the TARDIS mainframe, and here it stood, temporarily abandoned.
"What's stopping me?" he asked half in defiance, half in lazy curiosity.
"Besides your debt to me?" she asked. "No, you're right. Something like obligation is lost on the likes of you. Do as I say. Get the Doctor's attention, deliver my message and you will have your reward in due time not before."
"I got you a vial of her blood. I'll deliver the message in a few minutes. Why the delay? You wouldn't double cross me, would you?"
"Interfere with my plans, and you'll wish you were back where I found you."
The man hung up. Knowing the Doctor would head for the nearest medical bay first, he set down the opposite way down the hallway towards the stasis hanger with one last glare at the big blue box.