Here’s the official Fringe synopsis for episode 6 of Season 3, entitled 6955 kHZ and airing next week on Sky1.

Back “over here,” the Fringe Division investigates a bizarre phenomenon when 15 people up and down the Eastern Seaboard, all suffer retrograde amnesia from listening to their shortwave radios on the same frequency. Much to Walter’s dismay, Peter presses on with piecing together the mass destruction device. Just as alternate Olivia and Peter’s chemistry deepens, the anticipation of Olivia’s return escalates.

Cast: Anna Torv as Olivia Dunham; Joshua Jackson as Peter Bishop; John Noble as Walter Bishop; Lance Reddick as Phillip Broyles; Blair Brown as Nina Sharp; Kirk Acevedo as Charlie Francis; Jasika Nicole as Astrid Farnsworth

Guest Cast: Ryan James McDonald as Brandon; Clark Middleton as Ed Markham; Kevin Weisman as Gemini; Mark Acheson as Murray Harkins; Vincent Tong as Shen Chan; Minh Ly as Dan Liang; Paula Lindberg as Becky Woomer; Tyler McClendon as Laird Woomer

And here’s the US trailer for it –

httpvh://www.youtube.com/watch?v=wwyXOCxUndM

Fringe: 6955 kHZ airs Tuesday 16 November at 10pm on Sky1.