Just saw "The Constant Gardener" the other day.  I was very impressed!  A very well made suspense/mystery movie.  I went into it thinking it was going to be a pretty dry delivery / message about how we basically are using the African continent as our pharmecutical laboratory testing (and have been for 50-60 years, plus.  See:  Polio vaccine trials injecting Africans with SIV, creating HIV/AIDS epidemic.. but I digress.) but it was a very well crafted story.  It utilized a lot of flashbacks and a split timeline to tell the before/after.   I fully recommend this movie if you haven't seen it.  One of the best I've ever seen.