幸存者们发现岛上存在神秘建筑入口,在杰克(马修·福克斯 Matthew Fox 饰)的带领下进行探索,强制进入舱门后,发现里面竟然有人,且是杰克曾经在现实中有过一面之缘的戴斯蒙德(亨利·伊恩·库斯科 Henry Ian Cusick 饰),如同看到救星一般,戴斯蒙德留下一串数字密码便跑掉了,而杰克一行则需要接替他的任务——每隔108分钟输入密码以关掉警报。在舱门中,幸存者们找到充足食物,也由一卷录影带了解到这座孤岛的背景,似乎和某个失败的实验有关。另一方面,扎起竹筏试图离开岛屿的迈克尔(哈罗·佩里纽 Harold Perrineau 饰)等人并没有成功驶向深海,而是被潮水带到岛的另一边,发现还有一群机尾的幸存者,他们挟持着迈克尔等人慢慢向营地靠近……
Season two will pick up three years after the dramatic conclusion of series one, with Tasha hiding on the island with her daughter Emily, while Jen has moved on and is preparing to get married. Living under false identities, Tasha has started a new life for herself and Emily. However, Tasha is forced to abandon her fresh start when she learns that Jack has been released from prison early having only served a year of his sentence. Jack appears to be a changed man, but who can each of them really trust, and can anyone truly change?
The Brassic gang are back! Returning for season six, Vinnie (Joe Gilgun), Erin (Michelle Keegan), Tommo (Ryan Sampson), Cardi (Tom Hanson), Carol (Bronagh Gallagher), Sugar (Joanna Higson), Ash (Aaron Heffernan), JJ (Parth Thakerar), Meena (Bhavna Limbachia) and Jim (Steve Evets) are back for even more madcap adventures and thrilling escapades.