As the series progresses, Creek gradually changes from an asocial anorak (nerd) to a man with a great deal of wit and charm. This helps to fuel the romantic thread between him and Maddy. Jonathan's trademark duffle coat worn in the first series was actually Alan Davies' own coat that he wore to the auditions; it helped him win the role, as the writer and producers thought it suited the character. After the first series, Jonathan's coat was supplied by the wardrobe department. Davies kept the original at his home, and wore it again for the 2009 New Year special.