Time traveler

A time traveler is someone who has the ability to travel forwards or backwards through the timestream. Some may possess such an ability as a super-power, though most require the usage of a special device, such as a time machine, to achieve such a feat.

Time travel is the process by which a person or object moves itself through the timestream through unconventional means. This process can be achieved through an artificial construct that allows one to translocate their corporeal form backward or forward through time, usually referred to as a time machine. Some may develop a psychokinetic ability to transpose their consciousness through the timestream while their physical body remains at its origin point. Time travel has been featured in a multitude of science fiction stories, novels, films and television programs such as Doctor Who, Timecop, Quantum Leap and Time Trax, which deals expressly with the subject of time travel, but has also been presented in other sci-fi programs like Farscape, Star Trek, Star Trek: The Next Generation, Star Trek: Deep Space Nine, Star Trek: Voyager and Star Trek: Enterprise.

Characters who have traveled through time
The following includes characters who have traveled through time on occasion, and usually under very specific circumstances. As they do not perform such feats as a matter of daily routine however, they are not technically classified as time travelers.

Time travel companions
This section relates primarily to the Doctor Who multimedia franchise. These are individuals who are companions of the The Doctor and have journeyed with him on his many adventures. Though they frequently engage in time travel, these individuals are not experts in quantum mechanics.