The Wilby Conspiracy (1975)

Starring:

• Sidney Poitier
• Michael Caine
• Nicol Williamson

IMDB.com
Having spent 10 years in prison for nationalist activities, Shack Twala is finally ordered released by the South African Supreme Court but he finds himself almost immediately on the run after a run-in with the police. Assisted by his lawyer Rina Van Niekirk and visiting British engineer Jim Keogh, he heads for Capetown where he hopes to recover a stash of diamonds, meant to finance revolutionary activities, that he had entrusted to a dentist before his incarceration. Along the way, they are followed by Major Horn of the South African State security bureau and it becomes apparent that he has no intention of arresting them until they reach their final destination.

Death of a Snowman [a.k.a. Soul Patrol] (1976)

Starring:

• Ken Gampu
• Nigel Davenport
• Peter Dyneley
• Madala Mphahlele
• Bima Stagg
• Morrison Gampu
• Joe Lopes
• Miriam Mthlose
• Moira Downie

Storyline
Master criminals meet violent death in Johannesburg, South Africa, a city wrought with organized crime. Steve Chaka (Ken Gampu), an ambitious news reporter,learns that these deaths are from the hands of an all-black vigilante group known only as "War on Crime." Teaming up with Lt. Ben Deel (Nigel Davenport) of the local police department, Chaka investigates anonymous tips regarding future "hits"and ends up fighting for his life to uncover the truth behind the vigilante killings.