“The Constant Gardner” (2005) is a conspiracy thriller directed by Fernando Meirelles (City of God) with a screenplay based on a John le Carré novel of the same name. Loosely based on a actual incident in Nigeria, the plot follows Justin Quayle (Ralph Fiennes), a British diplomat based in Kenya who while investigating the death of his activist wife Tessa (Rachel Weisz), uncovers criminal activities of a Big Pharma corporation with connections to the highest levels of power.