The Impossibles Model Sheet and Character Design Original Art by Willie Ito, Group of 8 (Hanna-Barbera, 1966). Rare set of three original hand-drawn studio model sheets of The Impossibles. These drawings are the original artwork that were used to print off sheets that went to animators. This show premiered on 9/10/66 on CBS. The three Super Heroes were voiced by Don Messick, Paul Frees, and Hal Smith. The artwork is by famed animator Willie Ito, drawn in graphite on 12 field animation paper.