Alcatraz is the next TV hopeful from the Bad Robot folk. Here's a trailer that's started doing the rounds.
So, what do you reckon? Interdimensional portals? Time travel? Ghosts? All of the above?
This video from Comic-Con features the show's producer Elizabeth Sarnoff saying "The big difference between this show and Lost, I think, is that we want to answer these questions, we want to explore this mythology" which seems to carry the subtext of "We actually know where we're going this time."