Frontline

PBS | 10:00 pm

"Terror in Europe" takes an inside look at the efforts by officials to counter the Islamist terrorism underscored by attacks in France and Belgium. Some of those authorities detail — within the boundaries that they can — the measures they take to anticipate and prevent such incidents, with some of the latest technology playing a major role. With that said, basic, old-fashioned detective work also remains a huge element of the strategy.