The fascinating thing about Mick Jackson’s film is the unexpected strategy the lawyers take to counter the claim the Holocaust never occurred. The film may be a little dry, but the topic is not. Nor are the performances from a strong cast headed by Rachel Weisz as the historian appalled at having to bear the burden proof, Tom Wilkinson as the barrister who likes opera, fly fishing and whisky and Timothy Spall as the glib denier, who is as slippery as an eel swimming in a pool of oil. Based on Deborah Lipstadt’s book, David Hare’s screenplay focuses on the topic, immersing us in the protagonist’s life and beliefs before opening our minds to the larger issues. It is an intellectually stimulating film that raises not only questions about the Holocaust, but about the issues of potentially proving any historical event has occurred.