A Thousand Stars: Episode IV, Part 24

Luke and Han spend a good portion of their time on the Death Star dressed in stormtrooper uniforms. Yet we're never left with much doubt as to their identities. First off, they take off their helmets whenever they can. Lucas was well aware that covering someone's face is quick way to strip them of humanity and personality, particularly if they're all wearing the same mask.

Secondly, even when their faces are covered, Han and Luke just don't move around like stormtroopers. Contrast these marching drones with the unique behaviors of our heroes. They're unused to the stiff uniforms, Luke is constantly craning his head to try to see better through the helmet, and of course as Leia points out, Luke is too short for a stormtrooper. I particularly enjoy his final pose before taking off the helmet for good, an almost childlike tilting of the head as he sees the princess in person for the first time. No wonder Leia wasn't fooled for a second.

Next time, the iconic trio in action...