The book that Rush's escort is reading in the car is "Old Man's War" by John Scalzi. Scalzi was creative consultant on the series.
Mike Dopud who plays Varro in this and many other episodes in this series also appeared in the Stargate SG-1 (1997) episodes Within the Serpent's Grasp (1998); as a Jaffa warrior, The Other Side (2000); as a Eurondan Soldier, Full Alert (2005); as Colonel Chernovshev, and Bounty (2007); as Ventrell. He also appeared in the Stargate: Atlantis (2004) episodes Coup D'etat (2006); as a Genii Soldier and Tracker (2008); as Kiryk.