Did you enjoy the trip Over There this week on Fringe? As detailed in our weekly review, the Fox drama returned from a three-week hiatus with an installment that focused on the Alternate Universe.

Next Thursday, though, we'll return to this world, as the team works on the case of multiple people suffering from amnesia due to the same radio frequency. Who is sending it out? To  what end? How old is it?

These are all questions Walter and Peter discuss in the following preview, while the latter also keeps working on the Other Side's mass-destruction weapon and pursuing his relationship with Fake Olivia.

[video url="http://www.tvfanatic.com/videos/6955-khz-preview/" title="6955 kHz Preview"] [/video]

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.