Time portal

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Time portals are doorways in time, employed in various fiction genres, especially science fiction, fantasy and romance, to transport characters instantaneously to the past or future. They can be represented as vortices of energy, which allow matter to travel from one point in time to another by passing through the portal, or may appear as an ordinary doorway.

[edit] Time portals in films

In most films, time portals are used to take a group of people or a single person back in time. The most popular of all time travels would be travelling back to the time of the dinosaurs. In some films time portals can also be set as a hazard, for example, they can begin to go haywire which makes them accidentally transport something or someone from a different time to the present; again the most popular is a dinosaur being accidentally brought into the present world.

[edit] Time portals in television

In the 1967 Star Trek episode, "The City on the Edge of Forever" a temporarily deranged Dr. McCoy runs into a time portal, an ancient sentient stone-like ring which calls itself The Guardian of Forever, and is transported back to 1930's depression-era Earth and history is changed as shown when the Enterprise disappears from orbit. Capt. James Kirk and Mr. Spock follow through the time portal to set things right.

In the 1969 Star Trek episode, "All Our Yesterdays (Star Trek)" Capt. James Kirk accidentally passes through a time portal. Spock and Dr. McCoy try to recover Kirk. All three are transported into the past of the planet Sarpiedon.

In the TV series Mirror, Mirror and its sequel Mirror, Mirror II, the story revolves around an old mirror. At the beginning of the story it is discovered that the mirror can be used to travel back into the past, 1919 and 1867 respectively.

In the documentary Prehistoric Park in which Nigel Marven activates a time portal to travel to different geologic time periods to rescue rare prehistoric species.

In the BBC television series; Goodnight Sweetheart, the main character; Gary Sparrow uses a time-portal to go back in time to WWII era Britain.

In The Girl from Tomorrow Part II: Tomorrow's End, a time portal called The Time Gate is used by a terrorist from the year 2500 to take water from 1990 to his own time.

The Science fiction series Torchwood centres most on the effects of a rift in both time and space, through which humans, aliens, and devices emerge.

In the science fiction series Primeval, a group of scientists investigate time anomalies, through which creatures travel.

[edit] Time portals in computer games

Time portals are a common element in computer games, most notably the 'Timesplitters' series, which involves characters utilizing time portals to move through time and is intrinsic to the plotlines in the second and third installments of the series, where a character called Sergeant Cortez moves through time to complete his objective by using these portals.

Time portals are also the original mode of time travel in the SNES game Chrono Trigger. There are quite a few of them found throughout the game and seem to be activated by the use of a "key" made by Lucca. The original portal found in the game actually occurs due to an accident that takes place at the beginning of the game involving Marle's pendent and a teleporting experiment.

Most time portals are generated via a handheld item such as a watch, or a glove. However, some time portals are such things as mirrors, or other items such as a key in the Harry Potter series. Literal portals, which are not items that you would use on a day to day basis, are also common.

"Time rips" and time travel in general are the central theme and plot engine in Space Quest IV: Roger Wilco and the Time Rippers as the titular character, Roger Wilco, is sent into the future by means of a time rip in order to save his home planet, which had already experienced a series of crises in the future time period to which he is initially sent. Throughout the game, Roger Wilco travels through different time periods in the future to complete various goals by using time-traveling vehicles called "time pods."