The Wilby Conspiracy (1975)

Synopsis
The Wilby Conspiracy is set in South Africa, at a time when Apartheid was the order of the day. Political activist Shack Twala (Sidney Poitier) finds an unlikely -- and reluctant -- ally in the form of the British Keogh (Michael Caine). Both Twala and Keogh are scrutinized by racist police official Horn (Nicol Williamson), who hopes that they'll lead him to the hideout of chief activist Wilby (Joe De Graft). Based on the novel by Peter Driscoll, The Wilby Conspiracy abandons its sociological overtones early on in favor of an extended chase. The film reteams Poitier and director Ralph Nelson, who, 12 years earlier, had collaborated on Lilies of the Field. ~ Hal Erickson, All Movie Guide