Reese's conversation with Hersh ("All I want to know is who you work for." "But that would be telling.") is a reference to the opening sequence in episodes of The Prisoner (1967).
As John enters one of the hitman's hotel room, Finch tells him that the room is registered under the name, "Peter Krieg." This is the name of Jeremy Irons' character in Die Hard With A Vengeance (1995) before it's revealed to be an alias.
The restaurant recommended by Finch with "the best rib-eye in town," The Grant, is where Annie Delaney (Liza J. Bennett) worked in Triggerman (2012).
Interesting Factoids revealed:
- The first public cell phone call was made from the New York Hilton in 1973.
- A rumor that the Martini was invented at the Knickerbocker
Booked Solid is the term used to describe a hotel or restaurant that has no reservations available for the time or date requested.