The hotly anticipated final season of ABC’s Lost premieres Tuesday night, which means, after five seasons, it’s finally time for J.J. Abrams, Damon Lindelof and Carlton Cuse, et al., to give us some answers. (Right? … right?) Whether you’re hosting a viewing party or curling up alone with the iPhone off and a do-not-disturb sign on your door, make sure you have your iPhone or iPod Touch equipped with these Lost related iPhone apps.

To celebrate that the end is nigh, you can live first-hand what Desmond and the other "Losties" were subject to way back in Season 2 before the hatch went kaboom. Download the Doomsday Terminal (free) iPhone app and see how long you can survive. Set your own combination of numbers—might I recommend 4, 8, 15, 16, 23 and 42—to enter every 108 minutes. You’ll have to remember to re-enter your sequence after the allotted time has elapsed, or else you’ll die and the world will implode. The Lost in Time (free) iPhone app is similar—enter those fated numbers to save the world or perish—but it is ad-supported.

In between entering the numbers, gather your Dharma cohorts for a little friendly—or was it hostile?—competition. The Lost Quiz TV Trivia iPhone app (99 cents) includes more than 1,100 questions covering the past five seasons of the show. Each question includes the season and episode number it’s from along with four possible answers. You can also check out the Dharma Lost Trivia iPhone app (99 cents), which offers about 225 questions sorted by category topic, such as  Kate & Jack,  Faraday & Desmond and Richard & The Island.

Even though this season should be nothing but answers to the many, many thousands of questions posed in the previous 103 episodes, this is Lost we’re talking about. You know there will be just as many head-scratchers, red herrings and “are you kidding me?” moments than before. Lost Addict – The Unofficial  LOST iPhone Fan App (free) can keep you sane for the show’s remaining 18 episodes by gathering the Internet’s newest theories, discussions, videos and podcasts every day. You’ll probably want to keep access to Wikipedia with Wikipanion (free; Wikipanion Plus, $4.99) close by to quickly research any new symbols or hieroglyphics or mythology and philosophy references.

Once Lost is finished, our questions answered, and the fates of Jack, Kate, Locke and others are determined, we’ll probably all be in severe need of a vacation. I don’t know how you’ll get to Australia, but Kayak (free; First Class, $1.99) has a killer deal on one-way seats from Sydney to Los Angeles on September 22—on Oceanic flight 815.

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