A familiar PBS franchise is being expanded as the broadcast service positions itself for what’s being called a “documentary boom.” Variety reports that “Frontline” will become a multi-part investigative series.

Executive producer Raney Aronson unveiled the plans Sunday during the PBS presentation at the Television Critics Association summer press tour.

“Aronson, who took the reins of ‘Frontline’ from founding exec producer David Fanning in May, said the Boston-based operation has several large-scale investigations in the works that will be presented as multi-part series in the coming years,” Variety reports.

Aronson reportedly told Variety that “Frontline” is examining options for “telling new stories in different ways,” but she stopped short of discussing reports that are in the works.

One project that is headed to air is “My Brother’s Bomber,” a three-part “Frontline” series premiering Sept. 29 that examines the bombing of Pan Am Flight 103 over Scotland in 1988.