This episode opens with a Tennessee Williams quote. "We have to distrust each other. It is our only defense against betrayal."
Eve's ( Elizabeth Tulloch )line, "'Two roads diverged in a yellow wood,'" is a reference to "The Road Not Taken," a poem by Robert Frost.
The contacts listed on Hank's ( Russell Hornsby ) phone are actually several members of the crew for Grimm.
Trubel ( Jacqueline Toboni ) references Pandora's Box, which in Greek mythology, was a jar believed to have contained all the evils of the world. Once opened, those evils are released into the world. The idiom "to open Pandora's box" means to perform an action that may seem small or innocent, but ends up turning out to have severely detrimental and far-reaching consequences.
This is the seventh time that an episode of Grimm has aired on Friday the 13th.