*Yoda plays an essential role in The Empire Strikes Back, but it took scores of sketches to settle on the look of the 900-year-old Jedi Master. The artists at first were told only that he was to appear very old and have non-human characteristics. The early efforts made Yoda too animalistic, but they evolved into a character that was smaller, more wrinkled and gnome-like and who seemed to have the weight of the galaxy on his shoulders. Both concepts by Joe Johnston. *Source: Back of card