Some LOST Spoilers

From io9

5×12 “Dead Is Dead.” To atone for sins of the past, Ben must attempt to summon the smoke monster in order to be judged. (Featuring Penny!)
5×13, “Some Like It Hoth.” Suspicions about a possible breach intensify after Ben is taken from the infirmary, and a reluctant Miles is forced to work with Hurley when he’s asked to deliver an important package to a top Dharma official.
5×14, “The Variable.” On the 100th episode milestone for the series, the time of reckoning has begun when Daniel Faraday comes clean regarding what he knows about the island. (Featuring Penny! And Charles Widmore!)
5×15, “Follow The Leader.” Jack and Kate find themselves at odds over the direction to take to save their fellow island survivors, Locke further solidifies his stance as leader of “The Others,” and Sawyer and Juliet come under scrutiny from the Dharma Initiative. (Featuring the young Charles Widmore!)

Also:

In case you hadn’t already noticed, the show is done with skipping through time, and we’re going back to the format of character-centric episodes with flashbacks. First, a Sayid-centric episode, showing the role reversal in the fact that he was one who first captured Ben, and now he’s behind bars with Ben giving him a sandwich. Then Daniel Faraday, and Miles. And at some point, we’ll learn how Sayid was captured and put on that plane, how Hurley learned about the Ajira flight, and how Sun, Ben and Lapidus will reunite with the crew in the 1970s.