"The Mystery of the Riverboat" while ending each chapter with a cliffhanger is more episodic in nature than the usual Universal serial and somewhat similar to Universal's 1934 "Tailspin Tommy" in that aspect as some plot lines are completed as a story within the overall story. Plus, while some serials often contained a title song or motif throughout, this one has six songs scattered around and about performed by either Marion Martin - and we have no idea if she was dubbed or did her own warbling - and former Three Mesquiteer and future head Mouseketeer Jimmie Dodd, who did his own. The overly-plotted (for juvenile Saturday matinée audiences to keep up with over a period of 13 weeks) story finds three Louisiana families, the Langtrys, Perrins and Duvals, as co-owners of swamp land in the Louisiana bayou country. Unaware that the property contains rich "nitrolene" deposits, they are considering an offer from speculator Herman Einreich, who is well aware of the secret, having killed the ...