"Mum, what are you doing here?" Rose asked her mother. "I was on holiday." Jackie explained, not quite satisfactorily. "Now what's up with him?" Jackie asked, gesturing to the Doctor. "He looks terrible, he does."
 "He's sick, Mum." Rose said, wearily. "Don't know what with." She rubbed her temples tiredly.
 "Sick?" Jackie replied. "It's not contagious, is it now?"