The Boondock Saints & The Duke have kidnapped Mathilda because one of Léon's jobs in the past, included a friend of the Saints. Now that the Saints know who was responsible for the murder of their friend, they're now out to get revenge. Léon may be out numbered here, but then again, he always is, but he still gets the job done. Them taking Mathilda has PO'd Léon and will stop at nothing to get her back.

-both are armed with the weaponary they had in each film