In 2369 Kahless the Unforgettable apparently reappeared on the planet Boreth ; upon which the original Kahless said he would one day return.

Within the fictional universe of Star Trek, Klingon is derived from the original language spoken by the messianic figure Kahless the Unforgettable, who united the Klingon home-world of Qo ' noS under one empire more than 1500 years ago.

Shortly before the end of the war (" When It Rains ..."), Gowron comes to Deep Space Nine to honor Martok by inducting him into the Order of Kahless, and then announces that he would be taking control of the Klingon forces from Martok because it was time for him to " take a more active role in the war ".

In the episode " The Sword of Kahless ", Dax joins Worf and Kor in the search for the titular Klingon artifact.

While traveling through a hazardous sector of space on his way back to Qo ' nos, he is ambushed by his old enemy, Toral, who plans to use a fake Sword of Kahless to take over the Klingon Empire.

It is ultimately revealed that this Kahless was in fact a clone, whom Gowron appoints to the symbolic post of Emperor of the Klingon Empire.

The story of Kahless is a cornerstone of Klingon mythology and religion.

In The Next Generation episode " Rightful Heir ", set in the late 24th century, on the planet Boreth ( a Klingon place of pilgrimage ), ambitious caretakers created a clone of Kahless from dried blood from the ancient dagger of Molor in a bid for leadership.

The ruse was scuttled by Worf, son of Mogh, who learned the truth and subsequently arranged for the new Kahless II to occupy a ceremonial position as a figurehead “ emperor ” in the Klingon Empire.

Played by actor Robert Herron, this Kahless also appeared as the typical original series-era smooth forehead Klingon ( which does not date back to the era of Kahless as revealed in Star Trek: Enterprise ).

As the Excalabians were reading Kirk and Spock ’ s thought patterns, Kahless ’ s depiction here was generally assumed by fans to be based solely on Kirk ’ s limited and heavily biased knowledge of Klingon culture.

The stories of Kahless are the stories of the Klingon people.

According to the Clerics, the only way a Klingon warrior could find the answers they sought was to: " Open your heart to Kahless, ask him your questions, let him speak to you with your mind unclouded by doubt or hesitation.

The Clone of Kahless was created by a Klingon scientist named Gothmara, with the assistants and aid of materials provided by the Clerics, " The r ' tak of Boreth " ( ST: DS9 Books The Left Hand of Destiny ).

The Clone of Kahless becomes emperor of the Klingon Empire in the Star Trek: The Next Generation episode " Rightful Heir ".

In the novel, Kahless left for Sto-vo-kor with a scroll detailing how he really brought about the creation of the new Klingon Empire.

It was Morath, who was not blood-related but was still considered a brother under Klingon custom, who forced Kahless to stick with his rebellion and slay the tyrant.

Krenn tells Tagore that's the source of the Klingon phrase Kahlesste kaase, Kahless ' hand, a swear or curse that many of the Klingons in the book utter when impressed or awed.

Kahless is the subject of an opera in the Klingon language: ’ u ’, which debuted at The Hague in September 2010.

According to Star Trek canon, the Klingon Kahless created the first bat ' leth around the Earth-equivalent of 625 A. D. Klingon mythology holds that he formed the blade by dropping a length of his hair into some lava from inside a volcano known as the Kri ' stak Volcano, then cooling, shaping, and hardening it in a lake known as " the lake of Lursor ".

Kahless would rather die than live under Molor's tyranny ... ( TNG: " Firstborn ")

( TNG: " Rightful Heir ") When the Shroud of the Sword of Kahless was discovered, it was determined that the Sword of Kahless dated back at least 1, 400 years.

( DS9: " The Sword of Kahless ")

( DS9: " The Sword of Kahless ")

Gowron is once more challenged in the episode " Rightful Heir " by the apparently resurrected Kahless the Unforgettable.

Kahless the Unforgettable is a fictional character in the Star Trek universe.

Kahless is also said to have fought off an entire army single-handedly at Three Turn Bridge.

Moreover the book makes clear that the supposed clone of Kahless is in fact a clone of Morath.

Kahless is referred-to in the 1984 tie-in novel The Final Reflection by John M. Ford.

In Peter David's novel Imzadi II: Triangle, he is sprung from a Cardassian prison camp on Layzon 2 by Romulans led by Sela and forced into an assassination attempt on Klingon Emperor Kahless and Chancellor Gowron.

The non-canon novel Kahless, written by Michael Jan Friedman, gives a very different version of Kahless ' history.

One day, a man appeared before him claiming to be Kahless the Unforgettable who had returned to lead the Empire once more.

* Kahless was condemned to die by the tyrant Molor, who was angered that Kahless had incited the people against him.

The scroll says that Kahless was a loyal soldier of Molor who killed the son of the tyrant because he was acting in a dishonorable manner.

Thus, the blade contains the blood of Morath who sacrificed his life for his friend, not the blood of Kahless.

* This episode introduces the Duras sisters, Lursa and B ' Etor, and also marks the first appearance of Duras ' son, Toral, who will appear a second time in the Star Trek: Deep Space Nine episode " The Sword of Kahless ".

The alien then gestures to four more beings: the dangerous Earth human warlord Colonel Green ( who led a genocidal war on Earth during the 21st century ), the Klingon Kahless ( who spawned the Klingon Empire ), a feral-looking woman named Zora ( who conducted brutal experiments on the primitive tribes of Tiburon ), and the Earth human barbarian Genghis Khan.

The people begged Kahless to stop his weeping, and he did and walked into the water to find the lost sword.

* When Kahless united the people and gave them the laws of honor, he saw that his work was done.

Kahless fled with his company of soldiers and was then thought of as a sort of hero to the people.

The Klingon people were told not that this new Kahless was a clone, but that he was an heir to the original Kahless and the throne.