In an April 20, 1993 file photo, flames engulf the Branch Davidian compound in Waco, Texas. 

In an April 20, 1993 file photo, flames engulf the Branch Davidian compound in Waco, Texas. 

Susan Weems/AP

"We grossly underestimated the amount of control that David Koresh had over those people," a gravelly voice says in the trailer for the next How It Really Happened With Hill Harper.

The series will dissect the standoff and siege that led to tragedy in Waco on Sunday, Nov. 11, at 7 p.m. on HLN. The two-hour special will serve as the finale for the show's third season in this 25th year after the event. 

Koresh was the leader of a group called the Branch Davidians. 

The federal Bureau of Alcohol, Tobacco and Firearms raided their compound in February of 1993 after learning that he had been stockpiling weapons. It turned into a 51-day standoff. Four agents and five sect members died during the raid, and almost 80 members of the sect died in the fire that ended the standoff.

Hill Harper (The Good Doctor) hosts the show that "delves deeply into some of the most notorious crimes, mysteries, trials and celebrity tragedies of our time," according to CNN

Previous episodes have dissected serial killer Ted Bundy; NFL star and convicted murderer Aaron Hernandez; and the death of music star Selena.

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