 Principal photography by Sterling Productions, Inc. began on March 28 and wrapped early April, 1941, primarily filmed on a studio back lot.The transport aircraft used in "King of the Zombies" is the Capelis XC-12, built in 1933 by Capelis Safety Airplane Corporation of California.The aircraft was a 12-seat, low-wing cabin monoplane with two 525 hp Wright Cyclone engines.