Terminator: The Sarah Connor Chronicles picks up its second season with Sarah (Lena Headey) continuing her lonely fight to save the future, hoping to stop the impending apocalypse and change the fate of her 16-year-old son, John (Thomas Dekker). While the ever-evolving technological enemy grows stronger, John begins to take the steps to embrace his destiny as the savior of mankind, yet he finds himself caught between his fearless protector, the beautiful but potentially dangerous cyborg, Cameron (Summer Glau), and his new friend, Riley (Leven Rambin). And has his uncle, Derek Reese (Brian Austin Green), overstayed his welcome? FBI agent Ellison (Richard T. Jones) is now a believer, after Cromartie (Garret Dillahunt) spared his life, and he wants to figure out the truth. Complicating matters is Catherine Weaver (Shirley Manson), CEO of ZeiraCorp, who may know where to find the answers Ellison is looking for.