Catch up TV on Big School. Watch the latest and all other episodes of Big School now online, broadcasted on Channel 9. Catch up on your favorite Channel 9 TV show: Big School. Replay tv on its best! Big School , is the hysterical new comedy series written by, and starring, David Walliams of Little Britain and Come Fly with Me. Set in the Greybridge Secondary School, Big School follows the unconventional relationships of its dysfunctional teaching faculty.