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 Ahead missing a beat, adding immediate depth to characters, ratcheting up suspense [...], plus expanding the emotional palette of the series." In his review, John Griffiths of "Us Weekly" liked the personal dynamics almost as much as the bloodthirstiness. Some critics were less enthusiastic about the episode. Zack Handlen of "The A.V. Club" gave it a B+ grade; he praised the horror sequences in the episode, but called the character development "tepid". "At the very least", he wrote, "the show does a fine job working within its restrictions. There are a handful of absolutely top-notch set pieces in ['What Lies Ahead'],