The second of Columbia's serials (between "Jungle Menace" and "The Secret of Treasure Island"), and all of the first three were outside productions from Louis Weiss, with the remaining 54 serials being in-house assigned to various Columbia contractee producers. While this one is basically filled with canoes chasing canoes down the river, and air-plane crashes galore (at least 10 times in 15 chapters), it is heads and shoulders above the three serials Weiss produced for Stage and Screen Distribution in 1935-36. All three of the Weiss-produced serials for Columbia, while padded beyond the needs of the story line, make more sense logically than the majority of the Larry Darmour serials directed by James W. Horne. Nowhere near as much fun to watch, though. While it had been over two years since the Weiss-Merrick crew had made a serial, they still managed to populate this cast with nearly every player that had appeared in their "Stage and Screen" serials...