The Terminator movies haven't shown Skynet's most dangerous weapon.

Each of the six Terminator movies has featured new and deadly Skynet weapons, but the most lethal has yet to come on film.

Starting with Arnold Schwarzenegger's T-800 and Robert Patrick's T-1000 in the first Terminator films,

every movie has changed the Terminators following the heroes. Each new Terminator has its own killing tactics and powers, 

but one Terminator in the franchise's mythos outguns them all—and it hasn't been introduced in the movies yet.

The Terminator universe has expanded beyond the six films. The brainwashed humans from Alan Grant, Mel Rubi,

and Trevor McCarthy's The Terminator: The Dark Years comic miniseries are some of Skynet's most powerful weapons.

Skynet's most lethal weapon was introduced in 1996 using one of these approaches.In 1996,

Universal Orlando's T2-3D: Battle Across Time launched the T-1000000, or T-Meg. The now-closed live attraction reunited director James Cameron and the main actors from Terminator 2: Judgment Day.