This is the first episode that references the line "Trust no one."
Max tells Mulder that he read Mulder's pseudonymous article in Omni Magazine about the Gulf Breeze sightings. Omni was a real magazine that covered both science and science fiction; it was published in a hard-copy edition between 1978 and 1995. The Gulf Breeze sightings were also "real." In late 1987, a Gulf Breeze, Florida, resident, Ed Walters, claimed that he had seen--and photographed--an alien spacecraft near his home. Although some flying saucer enthusiasts found the photographs convincing, they were revealed as staged hoaxes several years later when the new owners of Walters's old house found a model of a UFO identical to the one in the photos secreted in the house. This is discussed in Gulf Breeze UFO Incident (1996).
As Scully looks around inside Max Fenig's trailer, the first shot of what she sees is of some shelves holding electronic equipment and some books, including one titled "The Other", which has an image of a "gray" alien on the cover. The object just to the left of the book is a piece of test equipment, an Eico Model 950 Resistance-Capacitance-Comparator Bridge. On the shelf below, the larger radio is an amateur (ham) radio transceiver, a Yaesu FT-990, capable of transmission on the amateur HF bands (160 meters through 10 meters), with a general coverage receiver covering 0.1 - 30 MHz. The smaller radio on top of it appears to be a CB radio.