"Incident at Victoria Falls" is a made for TV movie (or mini-series) that clocked in at over three hours. It's a Sherlock Holmes story but was not written by Arthur Conan Doyle. The story stars Christopher Lee and Patrick McNee as Holmes and Watson. Now I must point out that at the onset this film was at a disadvantage for me, as I have long thought that no one played Holmes nearly as well as Jeremy Brett in the lengthy British series' from the 1980s-90s...and this film does nothing to change this opinion.
The South African government is planning on presenting one of the world's largest diamonds, the Star of Africa*, to King Edward VII of the United Kingdom. However, worries about it becoming stolen prompt the British government to send Holmes and Watson to go to Africa to guard this rare gem.
Not too surprisingly (since the film is nearly 190 minutes), the there is a gem robbery and Holmes' trail leads through South Africa to Rhodesia (modern Zimbabwe) to Victoria Falls. Along the way are a variety of red herrings and a few famous folk just happen to be there...including Marconi and President Theodore Roosevelt!
So is this any good? Well, it's okay and fortunately Lee's performance is subdued and lacks the usual cliches. But the film is doomed by just being too freaking long. An hour could easily have been shaved off and the film just drags to its ultimate finale. Oddly, the female actresses in the movie were mostly very poor. Overall, just okay...not terrible nor all that great.
*By the way, there really WAS a huge diamond called the Star of Africa...and it was presented to King Edward VII in 1907. Subsequently, it was cut down into several very large gems...some of which you can see in the collection of the British Crown Jewels.