LOST: ABC Upfront shows a clip from the S4 finale
At the very bottom of this post from Watch With Kristin there is a complete breakdown of a scene from the Season 4 finale of LOST that was shown at the ABC Upfronts. For a tease of what the scene shows, in case you are wondering if it is worth being spoiled for, click on the jump link below. For those who know me, I’m a HUGE spoilerphobe - but I read the synopsis and it wasn’t anything that pissed me off because I now know about it. To each their own 
The description is of the Oceanic 6 in the transport about to land back in America - including the name of a guest star who is on the transport with them. It also includes a description of the family reunions that occur once they land - who is there and who is not there to great the Oceanic 6. All in all, not REALLY spoilery - since we know who all the members of the Oceanic 6 are, but the reunion scene and the guest star would be considered mildly spoilery to some.