I'm not trying to impersonate Nelson Mandela. I'm just trying to capture his essence. 
Dennis Haysbert goes from President Palmer (in TV show 24) to President Nelson Mandela in his new film Goodbye Bafana. The film centres on the interned freedom fighter, and the developing relationship with his pro-apartheid prison guard James Gregory - played by Joseph Fiennes. Here, Haysbert explores the film's themes, and describes the pressure of playing such a historically significant figure.
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