The red-orange Hazmat suits used at the beginning of the episode are the same as the ones used on multiple episodes of Stargate SG-1.
Dan Payne, who played the Kull Warrior on SG-1 is the "movie version" of The Adjuster.
Walter gets a voice message reminder from Dr. Verheul's office. Dr. Verheul was most likely named after Gordon Verheul, the series in-house director of photography since season 2.
Matty Finochio who plays Virgil St Pierre first appeared in Instinct (2008) in series 1 as Zach (the cameraman).