A T-1001 Terminator, a second liquid metal prototype, is introduced in the 2008 television series, Terminator: The Sarah Connor Chronicles at the start of the show's second season. (though sometimes misidentified as a T-1000 by reviewers)[9], masquerading as Catherine Weaver (Shirley Manson), the co-founder and current CEO of ZeiraCorp. "Weaver" often has mixed results when socially interacting both with subordinates at ZeiraCorp and Weaver's daughter Savannah (portrayed by Mackenzie Smith), but was written with an improved ability to adapt to and sustain itself in changing situations more adeptly than prior Terminators.
The T-1001's mission remains unclear throughout the television series, but diverts from the single-minded attempts to assassinate the Connors, as seen in the prior films. Through most of the TV series, the T-1001, as well as Sarah Connor and her allies, did not appear to be aware of each other's existence. As the head of ZeiraCorp, the T-1001 diverts that company's resources into developing an artificial intelligence, titled 'Project Babylon' which appeared sufficient to combat SkyNet's development. Catherine Weaver is first seen in the second season opener when she purchases the late Andy Goode's Turk computer system for $300,000 from an associate and then introduces this new computer system to her department heads to reveal her plans to create a new artificial intelligence computer system. Towards this end, Catherine Weaver recruits FBI Special Agent James Ellison to find and capture a Terminator in order to reverse engineer it using a variety of deceptions. Until the end of the series, Ellison is never aware of Weaver's true nature. Ellison delivers a T-888 Terminator's body to Weaver after it was critically damaged by Connor's Terminator bodyguard. The T-1001 advocates learning more about the 'robots' ironically in order to prevent Judgment Day. With Ellison's initial mission complete, it assigns him to act as tutor/mentor to the now incapacitated (and rebooted) T-888, which Weaver nicknames "John Henry".
John Henry quickly identifies Weaver as a machine, albeit different from itself, but obeys Weaver's instruction not to share that information with anyone, assuring him that everything done at ZeiraCorp is for John Henry's benefit. At one point, Weaver reveals a clue to the nature of its mission when it tells Ellison that Savannah's future safety is dependent upon John Henry, but that the reverse is not the case. This appears to be in contradiction to assumption that Weaver was coordinating the efforts to develop SkyNet to eradicate humanity.
In the TV series, the true nature of the T-1001's entire mission is never revealed, and much of what Weaver does in furtherance of it seems contradictory. In one of the episodes that shifts between the present day and post-Judgment Day, it is learned that leader of the resistance, John Connor, asked a liquid metal Terminator to join him, and the Terminator refused. In the series finale, by way of introduction, the T-1001 asks (using the same phrase) the same of Connor (and his bodyguard Cameron, who was privy to the aforementioned events in the future) through Ellison, sent as intermediary.
Also in the season/series finale, when Sarah Connor and John Conner finally meet Catherine Weaver face-to-face at her office, Ellison, Sarah, and John all discover Weaver's true nature when she uses her Terminator liquid metal abilities to form a shield to protect them from a flying Kaliba Corp drone which crash-dives into the ZeiraCorp building. When Sarah Connor discovers that ZeiraCorp possesses Andy Goode's Turk, she assumes that Weaver is constructing Skynet but Weaver corrects her by stating that she is "building something to fight it." Upon entering the basement, the four discover that John Henry has transported himself to the future with Cameron's chip, leaving Cameron's empty body. When Ellison and Sarah Connor decline to jump forward in time with Weaver and John Connor, Weaver instructs Ellison to pick up Savannah from school.
Weaver then transports itself and John Connor to a post-Judgment Day future in which John Connor is not known to the human resistance. Though Connor and the T-1001 arrived naked, the T-1001 forms "clothing" a moment later. After briefly talking to John, the Terminator slips away when the human resistance encounters John, thus leaving its whereabouts unknown.
