In the first scene of this episode we see a battle taking place at an intersection called Adams Street and O'Neil Street. Dennis O'Neil was the Batman editor and writer from the mid eighties until his retirement, while Neal Adams was a famous comic artist during the O'Neil Batman era that worked closely with him on many projects.
Helena Kyle's mother was killed when Helena was sixteen. The events in this episode take place seven years later, which means that Helena/ Huntress is twenty-three years old.
Re the episode title "Lady Shiva": the week long mourning of a Jew for a close relative is known as "sitting shiva".