For legal reasons, the production team made obviously fake banknotes for the scene where money comes flying out of a cashpoint. The £10 notes feature The Doctor's face and the phrases 'I promise to pay the bearer on demand the sum of ten satsumas' and 'No second chances — I'm that sort of a man'. The text is taken from The Doctor's lines in The Christmas Invasion. There were also £20 notes featuring producer Phil Collinson. These had the phrase 'There's no point being grown up if you can't be a little childish sometimes' on them, a misquote of the line originally spoken by the Fourth Doctor, in Robot. The notes have become collector's items, regularly selling for £50 or more.