The T-Infinity Temporal Terminator is created by Skynet. Its purpose is to make sure the timelines don't get out of balance. By far, it seems there is only one prototype created by Skynet and sent to "correct" the timeline.
The T-Infinity is built with an onboard time displacement equipment, making it possible to relocate itself in time. It is able to trans-locate direct hits from a weapon and not be destroyed. However, an indirect hit does weaken it. 
Terminator 2: Infinity
Skynet somehow found out the timeline is unbalanced when Uncle Bob appears in the same date, and decides to correct it by using a T-Infinity. The T-Infinity is sent back to July 17, 2009 just before John Connor becomes the leader of the Resistance.
Skynet dispatch the T-Infinity again from 2033 to 2015 in order to kill Tara Connor. During a raid in the Resistance Headquarters, the T-Infinity is temporally disabled by John Connor with EMP pulse and a steel bar, causing its onboard time displacement equipment to malfunction. Thus, both John Connor and the T-Infinity are sent back to Alabama in the year 1996.
The T-Infinity arrives Birmingham, Alabama in 1996. The malfunction has caused a confusion within its system, thus its mission priority becomes Sarah Connor.
The machine goes to young John Connor's school and kills the principal, waiting for Sarah Connor. It fails to terminate Sarah upon the first encounter. T-850. The T-Infinity follows her to the street and begins to fight the T-850s.Sarah runs to the street, only to face the army of the
After destroying the T-850s, the T-Infinity uses the chrono-imager to track down Connors to their hideout in the woods, only to be confronted by the Connors. During the battle, the machine's right arm is destroyed by John Connor with a bazooka. The machine is later destroyed by a Dire Wolf, a wolf Terminator used to destroy the T-Infinity. After destroying the Dire Wolf, John Connor uses the onboard time displacement equipment from the remains of the T-Infinity to travel back to the 2015 with Kyle Reese. Soon after the arrival, John uses T-Infinity's neural network to set a coordinate for a missile to hit the Skynet Hub in Nebraska, destroying Skynet once and for all.
- Terminator: Infinity
- Terminator: Revolution
- Main article: Terminator
The Terminator Series is a line of nearly identical Terminators mass-produced by Skynet. Units within a Series share common technological design, programming, material construction, and like chassis elements. Advances in Skynet's design theory that intended to improve infiltration success rates have also increased the available chassis sizing options within a Series, much in the way that like vehicles can be purchased with a wide variety of option packages. Additional features may be incorporated into subsequent production runs as situational demands merit. 
- It is not clearly established if the word "Series" or the series number should come first, such as "Series 800" or "800 series".
- The word "Series" is used before the series number in The Terminator, Terminator 2: Judgment Day, and Terminator 3: Rise of the Machines.
- In interviews, James Cameron consistently puts the word "Series" after the series number. For example, he used the phrases "800 series" and "1000 series" in an interview on the T2 DVD.
- Main article: Terminator
- The term "Series" has not been applied to certain one-off Terminators. For example, the T-1000 was reportedly a prototype and was not called a "Series 1000" in Terminator 2: Judgment Day, though James Cameron did call it a "1000 Series" in his DVD commentary. The T-1000000 was also a unique Terminator, and was not part of a series.
- The film/theme park ride T2 3-D: Battle Across Time does not use the word "Series" to refer to the T-70 line.
- The movie Terminator 3: Rise of the Machines doesn't use the word "Series" to refer to either the T1 or to the T-X. It does, however, use the phrase "Series 850" to refer to the T-850 in the DVD extra.
- The term "Model" is used instead of "Series" in Terminator: The Sarah Connor Chronicles. 
- In Terminator Genisys, Model is also used to refer Series as seen in the Original T-800's HUD screen.
- ↑ Anti-tamper modifications were introduced to T-888 Terminator CPUs to counter Resistance reprogramming efforts.
- ↑ In the pilot of Terminator: The Sarah Connor Chronicles, John Connor asks Cameron, "What model are you? Are you new? You seem... different." He does not refer to her series, at that point or later. Series 888 Terminators on the show are often called "T-888", "Triple-Eights," or "T-Triple-Eights," but never "Series 888".