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ABC

The series finale of Lost airs on Sunday, marking the end of six seasons of time travel, disappearing characters, and baffling plot twists. In honor of the final episode, we place a challenge to our readers: Summarize everything that happened since the show started into a single tweet of 140 characters or fewer.

The details: Type your summary into Twitter with the hashtag #Lost140, or put it in the comments section of this post (just be sure to limit yourself to 140 characters—our commenting software won't cut you off the way Twitter does) before Sunday at 8:59 p.m. Eastern. The Atlantic editors will select one winner, and the prize will be a year-long subscription to The Atlantic magazine. We'll also pick two runners up, who will get pride, joy, and bragging rights. We'll announce the winner and runners up by noon on Monday.

If you need some inspiration, Atlantic staffers have tried their hands at the task:

Suzanne Merkelson, official Atlantic.com Lost blogger: white/black? cain/abel? man of science/man of faith? jack/sawyer? present/past/future? remember that bad episode w/ nikki/paulo? #lost140

Adam Pasick, Atlantic.com editor: Two sides: One light, One dark. They come, fight, destroy, and corrupt—it always ends the same. See you in another life, brutha #lost140