Aside from external influences causing disruptions in the normal operations of transporters, the technology itself has been known to fail on occasion, causing serious injury or usually death to those being transported. This was demonstrated in Star Trek's 1979 film debut, "" when a malfunction in the transporter sensor circuits resulted in insufficient signal being present at the "Enterprise" end to successfully rematerialize the two subjects, and Starfleet was unable to pull them back to where they had dematerialized from. The transporter system attempted to rematerialize what little signal was available, and despite the efforts of Kirk and Scotty, the system failed and both subjects vanished from the transporter pad. Kirk, visibly shaken by what he had witnessed asked, "Starfleet, do you have them?", to which the response was made ""Enterprise", what we got back didn't live long, fortunately".