ABC’s Lost and its increasingly multiplying number of mysteries will come to an end… after three more seasons totalling 48 episodes, the show’s producers and ABC execs have decided:

“Due to the unique nature of ‘Lost,’ we knew it would require an end date to keep the integrity and strength of the show consistent throughout and to give the audience the payoff they deserve,” ABC Entertainment president Stephen McPherson said.

Lindelof said having the end point in sight was “incredibly liberating. Like we’ve been running a marathon and we actually know where the finish line is for the first time.”

Lindelof and Cuse said they’ve had “a road map for the series with all the major mythological milestones and the ending in place” for a while.

“What we didn’t know was how long we had to play the story out,” Cuse said. “By defining the endpoint we can now really map out the rest of the series in confidence.”

In case you’re keeping track at home, that will round out the run of the show at about 120 episodes…

[Source]