2 k Games today offers us a glimpse of the upcoming DLC for BioShock Infinite , the episode 1 of Burial at Sea , mostrandocene the first 5 minutes. We can thus see how Elizabeth and Booker met and give life to this new adventure into the depths of Rapture. All this takes place after the events of the original game even though the two protagonists don't know each other, for reasons clear only to those who have completed the game. The expansion is expected in the near future but for now without a release date.