The scriptwriters have been having a lot of fun with their Alien references. The previous episode had many scenes that referenced scenes in Ridley Scott's Alien. In this episode, Sheppard makes a direct reference to that film. However, this episode is more of a homage to James Cameron's Aliens. Numerous scenes in the episode - the cocoons in an underground facility, the lifesigns detector, the Iratus bug in a laboratory jar, the long shots of multiple levels in the facility - have direct analogues in the Cameron film.