简介：Having woken up in Hong Kong, with no memory for the last two years (!), Sydney returns to Los Angeles to try to piece together the last two years of her life and discovers the fates of her friends and family Vaughn has married thinking that Sydney was long dead; Marshall is having a baby with CIA tech expert Carrie Bowman; and Dixon is now the new division head of the L.A. office branch of the CIA. Sydney also learns the shocking fates of Jack and Sloane; the former is in CIA custody for communicating with Irina whom still is in hiding, while the latter is living in Switzerland under house arrest in exchange for co-operation with the CIA. Sydney is granted temporary CIA clearance on a case that may help her regain her memory and she meets a new enemy group called The Covenant.
简介：Sydney finds herself face-to-face with her long-lost mother, Irina Derevko, whose intentions for her daughter are made chillingly clear. However, Sydney manages to escape and rejoin Jack and Will in their escape from Taiwan. After arriving back in Los Angeles, Sydney continues her search for Vaughn, not knowing if he is dead or alive after being swept away by a wall of water in Taipei. Will's life is forever changed when he learns the truth about SD-6 and Sydney's life as a double agent. Also, Dixon must decide whether or not to inform Sloane of Sydney's suspicious activities. But Jack intervenes and covers for Sydney who later finds Vaughn who helps her try to track down her mother Irina who's searing for a Rimbaldi artifact called 'the Bible.'
主演：斯蒂芬·阿梅尔,盖布瑞·马赫特,莱克斯·斯科特·戴维斯,乔什·麦克德米特,布莱恩·格林伯格,Troy Winbush,帕顿·奥斯瓦尔特,恩里克·克兰东尼,布莱恩·鲍姆加特纳,阿兹塔·加尼扎达,Rachelle Goulding,内森·维特,Carson A. Egan,玛姬·格蕾斯,维多利亚·嘉丝蒂,索非亚·佩尔纳斯,约翰·阿莫斯,马特·莱斯切尔,凯文·韦斯曼,爱丽丝·李