In the film, Dr. David Q. Dawson is a surgeon who returns home to London, England after military service in Afghanistan. After he hops off his carriage, Dawson comes across a little girl mouse named Olivia Flaversham, crying her eyes out about her father, Hiram, being captured by Fidget, sidekick to the dastardly Professor Ratigan. Feeling very sorry for the young mouse, he escorts her to Baker street as quickly as possible. He is surprised by Basil's strangeness, but soon catches on to his personality. He later becomes Basil's assistant and the two gentlemen become lifelong associates after defeating Ratigan.