Ever Carradine (Sharon Beck) and Colin Ferguson (Fritz's Doctor), who both guest star in this episode, portrayed sister and brother on Eureka.
The title "Zoo Story" bears no connection to the Edward Albee one-act play of the same name. Instead, the title refers to two story lines of woman being held behind bars against their will, in the case of Rusty's mom, incarceration for criminal wrong-doing, and in the case of criminally abducted woman, as caged slaves for over-the-border human trafficking.