Jamie:  I do n't know what you 're being so cautious abo ...
Dr. Who: Shhh !
Jamie: They left the door open for us , did n't they ? Hey , it 's half - past the nine o'clock .
Dr. Who: Yes , I know .
Jamie: But they made the appointment for _ ten _ . Why have we come early ?
Dr. Who: The early bird catches the worm , Jamie . Now , do be quiet . There 's a good chap . And for heaven 's sake , do n't knock into anything . Shh !