Behind almost every piece of Disney merchandise is a mouse that Walt Disney did not actually draw. This episode unpacks the life of Ub Iwerks, the Kansas City animator who met Disney in 1919, invented a motor-driven camera switch that eliminated the biggest bottleneck in early animation, designed Oswald the Lucky Rabbit, and then, after distributor Charles Mintz poached the studio’s staff and took Oswald in 1928, locked himself in an office to draw up to 700 frames a day for the first Mickey Mouse cartoons, including Plane Crazy and Steamboat Willie.

We follow the fracture that followed: the 1929 moment when Disney asked Iwerks to draw Mickey so Disney could sign it, the secret deal with Pat Powers that launched Iwerks’ own studio, the failure of Flip the Frog and Willie Whopper despite technical firsts like the first standalone color sound cartoon, and his humbling 1940 return to Disney. That second act turned him into a visual effects pioneer whose work on the optical printer, the sodium vapor process, and xerography shaped Mary Poppins, Sleeping Beauty, 101 Dalmatians, and even Alfred Hitchcock’s The Birds.

• How a father’s abandonment forged Iwerks’ obsession with controlling machinery and mastering his craft
• The 1928 Oswald ambush and the locked-door creation of Mickey Mouse
• Why technical brilliance alone could not save Iwerks’ independent studio against Disney’s storytelling instincts
• The sodium vapor process, xerography, and how Iwerks helped save Disney animation from being shut down
• Two technical Academy Awards, an Oscar nomination for The Birds, and posthumous recognition as a Disney Legend in 1989