Alliances are forged and broken as the Locke and Jack camps merge. Guest starring are Andrea Gabriel as Noor "Nadia" Abed Jaseem, Sheila Kelley as Zoe, Kimberley Joseph as Cindy, Dylan Minnette as David, Teresa Huang as surgeon, Skyler Stone as EMT #1, Todd Coolidge as EMT #2, Yvonne Midkiff as receptionist, Christopher Amitrano as Burditt, Kasim Saul as guard, Steve Boatright as Mike, Mickey Graue as Zack and Kiersten Havelock as Emma. Written by Paul Zbyszewski & Graham Roland and directed by Steve Semel.After tonight, five hours left: 6.14 The Candidate 6.15 Across The Sea 6.16 What They Died For 6.17 The End 6.18 The End “Across The Sea.” That’s a big one. 9 p.m. Tuesday. ABC.