"I believe I may be able to answer that." Mr Smith said, monotone.

The Doctor and Amy turned to the supercomputer.

"What's that?" Asked Amy.

"Its a supercomputer. Sarah Jane built it. Now shh!" The Doctor replied, "Yes, Mr Smith?"

"The Bane have the ability of self preservation whilst their body's are repairing. Perhaps as Sarah Jane has been so close to Mrs Wormwood whilst she was in this state, the nutritional substances was spread between them both. Enough to keep the vital functions going, but, as we have seen, not enough for activity." Mr Smith suggested.

Luke thought about this for a second. "Its plausible," He nodded.

The Doctor looked at Sarah Jane, who's head rested on his shoulder. He wiggled it and Sarah immediately stood straight, fear making her pupils dilate. She looked around the attic, and once realising there was no danger, sighed and once more allowed her body to slump against the Doctors.

"Psst. Earth to Sarah Jane." The Doctor stage-whispered.

"Hmm..." She replied.

"You hungry?" He whispered.

"Yeah, kinda." She whispered back. "Psst. Why are we whispering?"

"I dunno," He replied. The Doctor gave Sarah Jane a mischievous grin before picking her up, and carrying her downstairs, much against her protests.