Shouldn’t the documentary come first, followed by a fictionalized feature “inspired by true events”? Not in this case. Ben Affleck’s Argo introduced many viewers to the Mission: Improbable that sprung six U.S. diplomats out of Iran after the 1979 seizure of the U.S. Embassy. Argo was a Hollywood entertainment all the way, even copping the Oscar for Best Picture. Now comes a Canadian documentary that drops the brassy drama of Argo for a more straightforward approach. Its title refers to the Canadian ambassador to Iran, Kenneth Taylor, who not only sheltered the American escapees during their hiding but also fed information to Jimmy Carter’s government for the (ultimately, tragically) botched attempted rescue of the other hostages.