T-1000

T-1000 Terminator
Terminator films character
The "T-1000", played by Robert Patrick, partially revealing its liquid metal composition.
First appearance	Terminator 2: Judgment Day
Last appearance	Terminator Genisys
Created by	James Cameron & William Wisher Jr.
Portrayed by	Robert Patrick, other cast members, ILM special effects team (Terminator 2: Judgment Day) Lee Byung-hun, other cast members, Double Negative special effect team (Terminator Genisys)
Information
Species	Android
Manufacturer	Skynet
Model	Prototype Series 1000 Terminator

T-1001/Catherine Weaver
Terminator: The Sarah Connor Chronicles character
The T-1001 liquid metal terminator from Terminator: The Sarah Connor Chronicles in the disguise of Catherine Weaver.
First appearance	"Samson and Delilah"
Last appearance	"Born to Run"
Created by	James Cameron & Josh Friedman
Portrayed by	Shirley Manson, other cast members, ILM special effects team
Information
Manufacturer	Skynet
Model	T-1001

The T-1000, also known as a Prototype Series 1000 Terminator, is a shapeshifting android assassin that appears as the main antagonist of Terminator 2: Judgment Day, as well as a supporting antagonist in Terminator 2: 3-D Battle Across Time and Terminator Genisys. A similar T-1000 Terminator appears in the 2007-08 FOX television series, Terminator: The Sarah Connor Chronicles, where it is referred to as a "T-1001".

Created by the franchise's long-running antagonist, Skynet, the T-1000 is described in Terminator 2 as being composed of a mimetic polyalloy (nanorobotics), whose body is composed of liquid metal that allows it to assume the form of other objects (commonly knives and stabbing weapons) or people, typically terminated victims. Therefore, it is portrayed by multiple actors in the film. It is further explained in the prologue of the film's novelization, that the T-1000 was created through nanotechnology, and is a 'Nanomorph', able to scan the molecular structure of whatever it is touching and visually mimic it.

In Terminator 2, the T-1000 is portrayed primarily by Robert Patrick, and in Terminator Genisys, by Lee Byung-hun. In Terminator 2 and Terminator 2: 3-D Battle Across Time, the T-1000 is presented as a technological leap over the "800 Series" Terminator (Arnold Schwarzenegger). Described by Allmovie as "one of the most memorable roles in one of the most memorable films of the decade", Patrick's portrayal of the T-1000 earned him nominations for Best Villain and Best Supporting Actor at the 1992 MTV and Saturn Awards and was ranked #39 in the Online Film Critics Society's "Top 100 Villains of All Time" in 2002.