Another double for the third season. The differences of this costume are in the face. Barney's eyes appear larger and his mouth becoming slightly larger toward the chin. All of Barney's features are squarer (especially the mouth) and his forehead is closer to his eyes which really don't blink but move from left to right. The pupils are larger, and the eyes are more sunken in. Bob Lavallee, future production designer, was brought on to consult the building of the stage set. While on set, he discovered that the back part of the set, facing to the right of the treehouse steps, was being used for equipment. Barney drew up plans to extend the set's backdrop and fence, with a smaller tree placed in the back corner to hide the connected seam. With these changes, future series directors were allowed to shoot in all directions of the playground.