Jesse’s submarine mission in the future takes a fatal turn with unforeseen consequences in the present for John, Sarah and Derek; Cameron has become a liability and Sarah must deal…

Jesse has a flashback to a mission aboard her submarine, the Jimmy Carter. John and Sarah make plans to leave their house.

Cameron’s glitch resurfaces, resulting in unfortunate consequences for everyone. Riley is afraid that Cameron has discovered her secret.

While fighting to stay alive, Sarah is guided by the image of John’s father. Weaver’s attempt to protect John Henry has deadly consequences.

Sarah turns to a UFO convention for answers about the “three dots,” more details about Riley’s mission are revealed, and Ellison begins working with Catherine Weaver’s AI prototype, “John Henry.”

Terminators come after a family whose unborn daughter plays an important role in the war against the Machines, and Sarah, Cameron, and Derek try to protect them.

Sarah’s preoccupation with the three dots takes her to a place she believes Andy Goode’s Turk is being held. Meanwhile, Jesse’s plans have come complications and Weaver makes an important…

Sarah finds that the strange dreams she’s been having while she sleeps are slowly beginning to creep into her waking life, but she has no idea what the dreams mean…

The Connors find themselves on high alert and in odd company after their house is robbed. A Terminator terrorizes Ellison, while another gets dangerously close to John Connor. Derek and…

Why would a T-1001 ever need to visit a doctor? Sarah, John and Cameron hope to find out as they track another name from their list. Meanwhile, a woman who…

Walden deals with his ex-wife, Bridget.