Adapted from a novel by Giles Foden, this compelling UK drama features a titanic performance by Forest Whitaker as Idi Amin, the brutal dictator who terrorized Uganda throughout the 70s. A fictional young Scottish doctor (James McAvoy) follows his taste for adventure to Africa and by chance lands a job as personal physician to the general, who's just seized power in a military coup. Alternately charming and sinister, vulnerable and vengeful, Amin draws the naive young man deeper into his murderous regime, and by the time the doctor fully grasps the depth of Amin's evil he's complicit in it. Kevin Macdonald directed; with Kerry Washington, Gillian Anderson, and Simon McBurney. R, 123 min. Reviewed this week in Section 1. a Century 12 and CineArts 6, Pipers Alley.