Alludes to the 2005 movie Serenity (2005), directed and written by Joss Whedon. Jewel Staite who plays Holder's girlfriend Caroline Swift, played the part of Kaylee Frye in the movie. The movie title, Serenity, refers to the name of the fictional spaceship that appears in Joss Whedon's 2002 Firefly television series and the subsequent movie.
Hiro Kanagawa and Joel Kinnaman go on to star in Altered Carbon together.