In Brazil, nasty native Rafer Johnson (as Barcuna) is attacking peaceful tribes and luring survivors into slavery. A widening circle of death and destruction threatens the entire free world. Naturally, the world's secret agent of the jungles, muscular Mike Henry (as Tarzan), is called into action. Donning his action-ready loincloth, Mr. Henry picks up old friends "Cheeta" the chimp and "Baron" the lion. Henry and his pet sidekicks join Captain Jan Murray (as Sam Bishop) and orphaned native boy Manuel Padilla Jr. (as Pepe) on their small boat. Next to join is beautiful blonde doctor Diana Millay (as Ann Philips), who wants to inoculate natives against disease. The three guests offer more characterization than was usual for the "Tarzan" movies...
The trigger-happy Tarzan from the last film is gone; he remembers the name of his pet chimpanzee and notes its increased size. The cinematography is good, the dubbing and sound are not - we have a cartoon-like quality. There are some rough transitions and plot concerns - the diamond hunt is cast adrift - but "Tarzan and the Great River" is a good entry in the series. It is interesting and educational to see how the lion "Barron" leaves to hunt for food, in a small segment. The supporting cast is good enough for a series of their own - Murray, Millay and Manuel could have sailed on that boat for weekly TV adventures, without Tarzan. Their appeal was available, separately; at the time, Murray was doing some episodic television, Millay was showing some wicked versatility on "Dark Shadows", and Manuel was a regular on the "Tarzan" TV series starring Ron Ely.
***** Tarzan and the Great River (9/13/67) Robert Day ~ Mike Henry, Jan Murray, Diana Millay, Manuel Padilla Jr.