Thanks to everyone who alerted me to this and to DarkUFO reader Alphawao2 for the video.
Thanks to Tazz for the transcript
AFTER NEXT SUNDAY
SAWYER: what's done is done
JUST ONE SERIES
JACK: it doesn't have to be this way
MILES: is that a bomb!?
KATE: we have to stop him
JULIET: live together die alone
JACK: are you with me on this
IS RUNNING OUT
LOCKE: Things will change
THE SERIES FINALE OF LOST A DOUBLE EPISODE NEXT SUNDAY AT NINE SKY ONE AND SKY ONE HD