Within the first flashback to The Island, Slade, Oliver and Sara are seen burying Shado. Hers is one of three graves with headstones made of wood. The others are marked for Robert Queen and another with Chinese calligraphy carved into it, most likely, Yao Fe's grave.
Officer Lance mentions St. Walker's Hospital, referencing Saint Walker, a member of the Blue Lantern Corps.
The words Maya's singing in Spanish when Laurel visits her in the hospital translates to "A good boy . . . a good boy . . . A clever boy, a beautiful boy" in English.
This episode is said to be set five weeks after the previous, which was set around Christmas-time, putting this episode sometime in January or February, approximately a year and a half after Oliver first became active as the vigilante.
Episode events said to be eight months after the Undertaking by Sebastian at the beginning of his rally, placing it sometime in January.