Where Did That White Kamen Rider Come From? (白い仮面ライダーはどこから来たのか Shiroi Kamen Raidā wa Doko Kara Kita no Ka) is the twelfth episode of Kamen Rider Drive. This episode marks the debut of the Amazing Circus Shift Car, Go Shijima, and his first full transformation into Kamen Rider Mach following the Secondary Rider's in both Movie War Full Throttle and the previous episode. It also features the debut of Mach Magarl.