Air date: 2021-11-28

Runtime: 50 min

In Florida, a man mysteriously falls ill and dies. Special Agent Matthew Ryker suspects an anthrax attack - how many others have been infected?

Air date: 2021-11-28

Runtime: 49 min

Ryker’s investigation moves to New York as another case of anthrax occurs. Bruce Ivins begins having suspicions of his coworkers.

Air date: 2021-11-29

Runtime: 46 min

An attack on Capitol Hill sends Ryker and his team to a mail facility that’s become a hot spot for anthrax infections.

Air date: 2021-11-29

Runtime: 47 min

The FBI learns more about Bruce Ivins’ peculiar past behaviors after an old colleague raises red flags. Ryker and Dani trace the origin of the letters.

Air date: 2021-11-30

Runtime: 51 min

All eyes shift to “Mr. Z.” As they start to zero in on a suspect, Ryker and Dani get new assignments - but that won’t stop them from chasing their lead.

Air date: 2021-11-30

Runtime: 52 min

With two suspects in question, Ryker’s own beliefs about the case are tested.