The title translates to "To Return Evil for Evil".
During one of the debriefings, Grover mentions there were "...no fingerprints on the MANPAD." MANPAD stands for Man Portable Air Defense System.
In a tragic coincidence, about two weeks after this episode first aired, a tourist helicopter carrying seven passengers actually did crash in Hawaii (albeit on Kauai, not Oahu).
During a conversation in this episode, Danny mentions a boiler room. Scott Caan (who plays Danny Williams) costarred in a film with the title "Boiler Room" in 2000. A fun nod to the film.
Junior says that Madura has a property in "central Florida" but the address shown is in Coral Springs, a city in south Florida.