When Baines is mocking the Head Master's militarism, he uses the expression "Etcetera, etcetera" referencing the Seventh Doctor's mocking of Davros's militaristic rant. The little girls in both episodes have the same theme music.
Character Al Haskey, dressed as Santa Claus, tells a boy who has asked for a Dalek for Christmas, how brilliant the Daleks are in this Doctor Who story.