This episode is the directorial debut of the series lead, David Giuntoli.
This episode opens with the quote, "You will face yourself again in a moment of terror." This is from Mihail Sebastian's novel 'For Two Thousand Years'.
The title is a reference to the poem, "O Captain! My Captain!," which was written by Walt Whitman in 1865 about the death of Abraham Lincoln. The poem also was notably a pivotal part in the script of the 1989 film Dead Poets Society, gaining further popularity and significant prominence in pop culture.
Eve is briefly seen looking at one of Rosalee's books in the spice shop, turned to a page with an ancient Latin heading above an illustration that reads, "Esopus," which is a medieval spelling for Aesop, the Ancient Greek story teller known for Aesop's Fables (one of Aesop's Fables, The Wolf in Sheep's Clothing, was previously used as the source for the episode quote in "The Good Shepherd").
Jeremiah's apartment number was 603, which is a reference to the episode number.