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This story was previously published at WGBH News.

When Boston Globe arts reporter Geoff Edgers and multimedia producer Darren Durlach proposed making a documentary about five runners who were crossing the Boston Marathon finish line at the moment that the bombings took place, editor Brian McGrory’s reaction was: Why not?

“What do you need? Two weeks?” McGrory recalled asking them.

As it turned out, it took Edgers and Durlach eight months, thousands of miles on the road and, as McGrory put it, “God knows how many dollars” to make “5 Runners,” which premiered before a crowd of several hundred people at the JFK Library Thursday evening.

The 25-minute film, which McGrory called “the first full-fledged documentary that theBoston Globe has ever produced,” will debut on NESN on Monday. It’s an early sign that a strategy to move into television, which Globe owner John Henry announced earlier this year, is beginning to take shape — although Edgers and Durlach began working on the film before Henry bought the paper. (Henry is also the principal owner of the Red Sox, which controls a chunk of NESN.)

The film, which grew out of a story Edgers wrote last April 21, follows the runners’ quest to return to the starting line of the 2014 marathon. I won’t give away how many make it. But “5 Runners” is deeply felt and unusual in its focus on how athletes — ordinary men and women who were well off the pace of the elite runners — were affected by the terrorist attack.

In a panel discussion after the film moderated by Globe deputy managing editor for features Janice Page, Edgers talked about the difficulties he and Durlach faced in staying in touch with their subjects. One of the runners, Volker Fischer, simply stopped responding, so Edgers sent him a card that read: “Volker — call me.”

When Edgers finally was able to connect with Fischer and visit his home in Illinois, he saw the card, unopened, on the refrigerator. “‘I liked the stamp,’” Edgers recalled Fischer telling him, explaining: “It was a Johnny Cash stamp.” (Disclosure: Edgers and I worked together at The Boston Phoenix in the mid-1990s. His wife, journalist Carlene Hempel, and I are colleagues at Northeastern University.)

Durlach said that the runners were “hesitant” about putting themselves forward when so many others had died or were wounded. “People were killed. Why do you want to spend time on my story?” is the way Durlach characterized their reaction.

Also joining the panelists was one of the five runners, Mary Jenkins of Ohio (spoiler alert: she’ll be running this year’s marathon), who said she will “probably be a basket case” during the race.

“It’s going to be hard, I think, Marathon Day, but I think it’s going to be exciting, too,” she said.

Edgers and Durlach plan to be at this year’s marathon as well. Their goal, they said, is to keep covering the story, and to expand “5 Runners” into an hour-long film.