Aka：Fringe - Grenzfälle des FBI / Експериментът / Грань / פרינג' / A rejtély / 危机边缘 / Fringe / Hranice nemožného / Fringe: Na granicy światów / 프린지 / Fronteiras / Межа / Fringe – rajamailla / FRINGE/フリンジ / 危機邊緣 / Ties riba / Giải Mã Kỳ Án / ฟรินจ์ เลาะปมพิศวงโลก / هامشية / ზღვარი / Ülisalajane / Na robu znanosti:
Summary：The fourth season of the American science fiction television series Fringe premiered on Fox on September 23, 2011 and concluded on May 11, 2012, consisting of 22 episodes. The series is produced by Bad Robot Productions in association with Warner Bros. Television. The show was officially renewed for a fourth season on March 24, 2011.
