TEXT: INT. OUTSIDE HEADMASTER'S OFFICE Mr Finch descends a flight of stairs. He rounds a corner and heads for a door labeled 'Headmaster'. There is a small girl sitting outside, waiting. At first, he walks straight past her, but then he pauses and looks back. MR FINCH: What do you want? NINA: The nurse sent me, sir. I was in English and I got a headache. MR FINCH: Then don't bother me, go home. NINA: I can't. MR FINCH: Why? Is your mother at work? NINA: I live in Ambrose Hall. The children's home. MR FINCH: No parents. No one to miss you? Nina shakes her head. MR FINCH (CONT'D): I see why the nurse sent you. You poor child. Poor... thin, child. Come inside. He turns to his office, and Nina stands to follow him. He opens the door for her and she enters. MR FINCH (CONT'D): It's nearly time for lunch. He shuts the door, and almost immediately there is a screech and flapping sounds from within, coupled with the sound of Nina screaming. INT. STAIRWELLS The school bell rings and the stairways are crowded with children hurrying to get to their next lesson. INT. PHYSICS LAB A boy, Kenny, heads into a science lab and goes to a bench. The door opens and a familiar pair of scruffy white Converses step inside. The Doctor plonks his bag down on the teacher's desk and faces the class. THE DOCTOR: Good morning, class. Are we sitting comfortably? He grins. OPENING CREDITS INT. PHYSICS LAB The Doctor scrawls the word 'physics' in capital letters on the whiteboard and underlines it. THE DOCTOR: So. Physics. He replaces the cap of the board pen and chucks it back down on the desk. THE DOCTOR (CONT'D):
SUMMARY:
The Doctor works undercover as a teacher in a school which Mickey believes is suspicious. Rose, working as a dinner lady , notices the cafeteria's chips have an adverse effect on other members of the kitchen staff, while the Doctor notes the chips seem to make the students more intelligent. The success of headmaster Mr Finch has aroused media attention; investigative journalist and the Doctor's former companion Sarah Jane Smith arrives at the school and discovers the TARDIS. She and her robotic dog K9 join up with the Doctor, Rose, and Mickey and they discover that the teachers are actually Krillitanes and the chips are coated with Krillitane oil, intended to make the children smart enough so they can decode the "Skasis Paradigm", a theory of everything , which will give the Krillitanes full control of time and space. The Doctor refuses to join the Krillitanes and evacuates the children, after which K9 detonates the container of the chip oil which destroys the Krillitanes, the school, and K9. Sarah Jane declines the Doctor's offer to travel with him and suggests that Mickey do so instead, and the Doctor gives her a brand new model of K9.