By Dan Snierson
April 03, 2014 at 06:52 PM EDT
Paul Schiraldi/HBO

HBO has firmed up the debut dates for the first season of The Leftovers and the last season of True Blood.

The network announced Thursday that the hotly-anticipated drama from Lost co-creator Damon Lindelof and author Tom Perrotta will hit the air June 15 at 10 p.m. Based on Perrotta’s best-selling novel  The Leftovers, the series revolves around the residents of a New York town who’ve been left behind after millions and millions of people around the world vanish mysteriously in a Rapture-like event. Season 1 consists of 10 episodes.

The following Sunday, June 22, at 9 p.m., True Blood will begin its seventh and final season of vampire drama with the first of 10 episodes that will answer the question “Who will live/die/wind up with Sookie?”