Was rumored to be titled "Fear the Hunters" which is the title of the eleventh volume of the comics.
The quote above the door to the rectory: "He who eats My flesh and drinks My blood has eternal life."
"Coda" is the Italian word for "Tail", but it also means Queue.
In English, Coda is defined as 'the concluding passage of a piece or movement', possibly referring to the fact that this episode is the 'concluding passage' of Season 5 Part A.
The scene where Rick (Andrew Lincoln) and Daryl (Norman Reedus) aim their guns, there is a sign behind them that says "5th floor". This is a reference to The Boondock Saints (1999), where Norman Reedus' character Murphy MacManus lived in a studio apartment on the 5th floor. Their stance is also similar to the MacManus brothers in scenes from the film.
The remains of Bob's cooked leg can be seen when Gabriel is wandering around the schoolyard and picking up the backpack.