Flula Borg and David Giuntoli were once roommates and are best friends in real life.
This is the second time David Giuntoli and Claire Coffee have worked together. The first being on the tv show Grimm.
Claire Coffee co-starred with David Giuntoli on Grimm. Brian T. Finney, the hiker, also appeared once on Grimm.
At approx. 1h 14m when David hugs Flula good-bye, Flula's back is to the camera and David very obviously moves the backpack Flula has on his back to make sure the camera sees his face and not covered for a second or two.