Lost? You soon will be when Series Five begins.

Confused by Lost?

Then you haven't a hope in hell when the show returns next year.

Producers plan to mess with the timeline so much that viewers won't know where, or when, the action is set.

Executive producer Carlton Cuse says they'll play with the flashback and flash-forward formula.

And after Ben Linus 'moved' the island, there will be few clues as to its whereabouts.

"We have something new this time," Cuse told fans at comic book convention Comic-Con in the US. "We're going to mix it up."

Executive producer Damon Lindelof added that the flash-forwards were a bit 'limiting' because they could only tell the stories of the Oceanic Six survivors.

"We could only focus on the Oceanic Six because we didn't want to reveal certain things - like Desmond getting off the island," he said.

"When season five starts, you won't know when or where you are - and the way we tell stories will be different, too."

"But you will be rewarded for hanging on all the way to end of series six."