Season 2 Episode 4

The Sheriff and evil scientist, Joseph, are testing a chemical weapon on a street in Nottingham and blame the ill effects on the Pestilence. However, Dan Scarlett, who is in town to visit his son Will, is sure it's not Pestilence. Dan wants Will to become his apprentice and run the family's carpentry business, but Will is frustrated that his father is blind to the good work he does as an outlaw. Father and son bicker about what's best for Will, but tragically fail to resolve their dispute before the Sheriff kills Dan for speaking out against the suspected poisoning. Robin realizes that the Sheriff is up to something and resolves to track down the source of the poison before more innocent people die. Bravely plunging into the heart of "pestilence" territory, the Outlaws work tirelessly to soothe the sick - not realizing that a helper from Leicester is the scientist, Joseph. Worse still, Robin discovers that Will is heading for the Castle to punish the Sheriff for killing his father.