The Constant Gardner

In a remote area of Northern Kenya, the region's most dedicated activist, the brilliant and passionate Tessa Quayle (Rachel Weisz), has been found brutally murdered. Tessa's traveling companion, a local doctor, appears to have fled the scene, and the evidence points to a crime of passion. Sandy Woodrow (Danny Houston), Sir Bernard Pellegrin (Bill Nighy), and the other members of the British High Commission assume that Tessa's widower, their mild-mannered and unambitious colleague Justin Quayle (Ralph Fiennes), will leave the matter to their discretion.
This film comments powerfully on medical research in the third world and the business practices of multinational pharmaceutical companies. John LeCarre, who wrote the book on which this film was based, said he did not sleep well for six months after he finished the book.