 Republic spent $597,528 producing serials in 1940 compared to $648,064 in 1939 (1939's total would not be beaten until the $782,204 of 1944).The studio produced four serials in each year, with the same mix of two 12-chapter serials and two 15-chapter serials.The serial was filmed between December 22, 1939 and February 7, 1940, the longest filming period of any Republic serial.