I considered the levels School, Town Hall, and GCHQ, but decided, nah:
1 Coal Hills School: blackboard, desk, teacher, principal, student
2 UNIT: undergallery, tower of london, drums of war, papal mainframe, peter capaldi
3 Tardis: exterminate the daleks, timey-wimey stuff, time lord double heartbeat, bigger on the inside, gallifrey falls no more