Colthorpe later assists Q as they attempt to analyse the remains of the bullet that killed 002. The ballistics expert assists Bond's investigation by identifying the bullet as having been made by a Portuguese man named Lazar living in Macau. A formal, refined gentleman, little else is learnt about his character.
Behind the scenes
The first draft of the script originally called the role Boothroyd until it was realised that was also Q's official name and it was subsequently changed. Colthorpe's character in many ways reflects the literary character of Major Boothroyd more accurately than Q, a no nonsense weapon specialist opposed to a comical technical genius.