By Dan Snierson
March 23, 2010 at 03:21 PM EDT

Image Credit: Mario Perez/ABCGuess who’s back/back again/Sawyer’s back/tell a friend…. Last week’s installment of Lost, titled “Recon,” featured the return of James Ford, who showed us that he wasn’t afraid to play poker with Smokey and Widmore on the island—or play naughty with Charlotte in the sideways world. The episode, which laid the groundwork for a showdown between Smokey and Widmore, raised a few questions that just happen to be explored in this week’s installment of Totally Lost. Doc J and I ask ourselves: Who/what lurks behind that locked door on the sub? Who is the crazy lady that Smokey calls Mommy? Why didn’t we invite the lovely Rebecca Mader over sooner? And for those who enjoy reading cryptic sentences on the bottom of the screen, we have included several teasers for tonight’s adventure, “Ab Aeterno.” Watch the video after the jump and then enlighten us with your latest theories: What’s behind Sub Door No. 1? Where’s Desmond? Who is the Lockeness Mother? And do you think Sawyer will pull off this latest con? Also an UPDATE: Part 3 of the video has been fixed and no longer cuts off mid-sentence. Enjoy!