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 sent zombies towards us and we had to improvise stabbing, so it was a bit touch-and-go from time to time." Similarly, Neil Brown Jr., the actor who played Guillermo, gave an interview where he obliquely referred to possible participation in the Season 2 premiere. This ultimately never made it to the screen. "What Lies Ahead" was heavily promoted in the months before its premiere. A four-minute trailer was released at the San Diego Comic-Con on July 22, 2011, and a one-minute preview was broadcast on July 27, 2011, during the season-4 premiere of "Breaking Bad", in which Grimes kills two