First broadcast 4th5th February 2010.br br The pathologists travel to South Africa, Nikki Alexander's childhood country. Nikki has been there for a short while and with the help of a now imprisoned official from the former regime, they've uncovered the grave of five activists who were eliminated.br br Shoki Mokgapa - Kudzai Marecherabr William Gaminara - Professor Leo Daltonbr Sindi Harrison - Zoe Shortbr Emilia Fox - Dr. Nikki Alexanderbr Linda Mphondu - Charles Matuzasbr Rapulana Seiphemo - Anton Radebebr Crispin Letts - George Houlbrokebr Adrienne Pearce - Judge (as Adrienne Pierce)br Andre Jacobs - Capt Cedric Brackenfellbr Tom Ward - Dr.