So I am walking to my work, (In London) when I see a bunch of white trucks parked on the block where my office is located! I asked someone what was going on, and sure enough, LOST was filming! Then to my surprise, I saw Alan Dale talking to some of the production crew!!
Some of the actors on set I had never heard of: Grant Boller? and Lance Reddick.
Source: JacksMuse via DarkUFO