International Standard Serial Number International Standard Serial Number An International Standard Serial Number (ISSN) is an eight-digit serial number used to uniquely identify a serial publication. The ISSN is especially helpful in distinguishing between serials with the same title. ISSN are used in ordering, cataloging, interlibrary loans, and other practices in connection with serial literature. The ISSN system was first drafted as an International Organization for Standardization (ISO) international standard in 1971 and published as ISO 3297 in 1975. ISO subcommittee TC 46/SC 9 is responsible for maintaining the standard. When a serial with the same content is published in more than one media
What Lies Below was a "pretty cool" mystery-of-the-week, and "while not quite as strong as when the mythology is in full gear, 'What Lies Below' was nonetheless a compelling hour of television." He was however bothered that there was no further information about the parallel universe. UGO Networks writer Alex Zalben compared "What Lies Below" to the similarly-plotted "The X-Files" episode "Ice". Zalben concluded, "Though both episodes are very good, 'Ice' is one of the best "X-Files" hours ever, perfectly channeling – but not ripping off – John Carpenter's "The Thing"." Director Deran Sarafian submitted "What Lies Below" for consideration in the Outstanding