SERIES FINALE: This documentary series already has looked at five dictators, giving their biographies and atrocities one hour each: Kim Il Sung, Saddam Hussein, Benito Mussolini, Manuel Noriega, and Francisco Franco. Tonight, the nonfiction series concludes with a look at Ugandan dictator Idi Amin. But The Dictator’s Playbook cries out for a season two, if only to give due credit – actually, due blame – to Adolf Hitler and Pol Pot, just to drop a few names. Check local listings.