Epilogues : The Sontaran Stratagem / The Poison Sky
"Colonel Mace, there's no sign of the Doctor or the TARDIS."
"Yes, I've been told he often disappears without notice. I need a status update on Doctor Jones' report."
"She's not here either, sir," another soldier said. "I've been looking for her and no one has seen her."
"Could she have left with the Doctor?"
"Another thing I've heard about the Doctor," Mace replied. "I'll just have to wait, then."