It's happened again – they've disappeared! Peter Collinson directs this adaptation of Agatha Christie’s novel, Ten Little Indians (also known as And Then There Were None), with a screenplay by Peter Wellbeck (or Harry Alan Towers). The film features Charles Aznavour, Stephane Audran, Elke Sommer, Gert Frobe, Herbert Lom, Oliver Reed, and Richard Attenborough. Bruno Nicolai composed the music, and Fernando Arribas was in charge of cinematography. Christie’s well-known story receives yet another update, with the events now taking place at a nearly deserted hotel situated in the Iranian desert. The setup is identical to that of the 1965 film: ten individuals are brought together at this location upon the invitation of the enigmatic U.N. Owen (voiced by Orson Welles), who delivers a recorded message accusing them of terrible acts from their pasts. As they begin to be eliminated one after another, it becomes clear that the consequence for these wrongdoings is death. The question remains: who’s responsible for the killings? While this marks the first color version and boasts an impressive cast, it's surprisingly uninspired, particularly when compared to the better 1945 and 1965 adaptations. The murders feel lifeless; the actors seem content merely to be in Iran, and suspense is noticeably absent. The only real question throughout is who’s committing these crimes. And even when that person is revealed at the film's end, it doesn't come close to justifying enduring over an hour and a half of uninteresting dialogue and a complete lack of thrills. 4/10

Source on TMDB