这集真是无头无尾
who is the bad guy?
why did the bad guy attack the bus?
why did the bad guy only take the woman?
why did the bad guy only steal the passengers' speech?
why didn't the bad guy fight back?
why didn't the doctor use his tardis?

我所提出的问题可能有答案,可是这集实在是莫名其妙...no offence
