Multiple choice general knowledge What is the only physical difference between the 'Thomson and Thompson' detectives? Their height. The shape of their moustaches One of them is bow-legged Their skin colour Reveal answer Fill a bubble to check yourself B Correct answer Explanation The only visual distinction between Thomson and Thompson is their moustache shape - Thomson's curls upward at the tips while Thompson's curls downward. Hergé intentionally made them nearly identical to reflect their comically interchangeable nature.