In the aftermath of an unspeakable act of terror, Police Sergeant Tommy Saunders joins courageous survivors, first responders and investigators in a race against the clock to hunt down the Boston Marathon bombers before they strike again.

A victim of the Boston Marathon bombing in 2013 helps the police track down the killers while struggling to recover from devastating trauma.

This Canadian made comedy/drama, set in Hamilton, Ontario in 1954, is a sweet and - at times - goofy story that becomes increasingly poignant as the minutes tick by. It's the fictional tale of a wayward 9th grader, Ralph (Adam Butcher), who is secretly living on his own while his widowed, hospitalized mother remains immersed in a coma. Frequently in trouble with Father Fitzpatrick (Gordon Pinsent), the principal of his all-boys, Catholic school, Ralph is considered something of a joke among peers until he decides to pull off a miracle that could save his mother, i.e., winning the Boston Marathon. Coached by a younger priest and former runner, Father Hibbert (Campbell Scott), whose cynicism has been lifted by the boy's pure hope, Ralph applies himself to his unlikely mission, fending off naysayers and getting help along a very challenging path from sundry allies and friends.

The history of the Boston Marathon from its humble origins starting with only 15 runners, to the first female runners, through the tragedy in 2013, and ultimately the triumph of 2014.

A rousing tale of the Korean athletes who ran the 1947 Boston International Marathon, the first international marathon held since World War II.

In April 2013, chaos erupted in Boston near the finish line of one of the world's oldest and most prestigious marathons. It was the worst terrorist attack on the United States since 9/11 and led to one of the most extensive and public manhunts in American history. Now, as the one-year anniversary approaches, National Geographic Channel presents a special two-hour event, Inside the Hunt for the Boston Bombers.

Immediately after the Boston Marathon bombing in April 2013, amateur detectives took the Internet chat rooms to try to find the culprits, looking for details in photographs uploaded to the sites that could point to the guilt of potential suspects.

A documentary about Boston and the technology involved to catch bombers

A retrospective on the Boston bombing.