After escaping Arkham Asylum on Christmas Eve, The Joker takes over Gotham's airwaves and terrorizes the city. He then challenges Batman and Robin to find his hidden TV studio and free his hostages, Commissioner Gordon, Detective Bullock, and Summer Gleason, before midnight.

The budding relationship between Sandra and Julian is beginning to attract attention in Casualty but she's concerned about the disciplinary hearing she is due to attend for giving an injection on Dr Rob Khalefa's orders. Rob tells Simon Eastman that it was Sandra's fault and Ash's money problems hit rock bottom. The staff have to deal with a badly beaten man, a man whose fallen off an electric pylon and a girl who has taken Ecstasy. Sandra has more differences of opinion with Rob and Julian steps in to reprimand Rob for making a wrong diagnoses.