JJ Abrams's 'Fringe' debuts teaser for fifth and final season - watch
In the short clip, Observers are shown marching towards the screen as voiceovers are played in the background.
Fringe is a sci-fi series - created by JJ Abrams, Alex Kurtzman and Roberto Orci, and starring Joshua Jackson, Anna Torv and John Noble - about members of a Federal Bureau of Investigation 'Fringe Division' team who investigate a series of mysterious events.
Noble recently returned to the set of Fringe after production was temporarily shut down in July so that he could be treated for a sleep disorder that apparently has affected him for years.
"I went to the hospital, had all the tests, and we put the strategies into place to deal with both of those issues, including the space-age mask that I wear to bed now - it's pretty unsightly," Noble shared.
Fringe's fifth and final season will premiere on September 28 on Fox. Sky1 airs the series in the UK.