Dr. Daniel Jackson was born on July 8, probably in the year 1965, on the planet Earth, mostly likely in New York City. He has been on SG-1 since its inception, except when he was ascended for a year and Jonas Quinn took his place.
Dr. Jackson has brown hair, which he wore long through the second season of Stargate SG-1, and he usually appears wearing glasses.
Daniel's parents, Melburn and Clare Jackson, were killed in an accident at the New York Museum of Art when he was eight years old. His grandfather, an archaeologist named Nicholas Ballard, refused to adopt him and young Daniel was put in foster care.
Jackson grew up to become an archaeologist, linguist and expert in ancient writing systems, languages and cultures. However, he was ostracized from the scientific community for his radical theories involving cross-pollination of ancient cultures and the Egyptian pyramids being landing sites for alien spaceships.
Since his grants had all run out and he had been evicted from his apartment, Daniel was desperate for work when he met a mysterious elderly woman named Catherine Langford. She got him a job translating ancient Egyptain hieroglyphics for the United States Air Force.
Dr. Jackson's intuitive genius discovered more than cryptic message from the dusty past. Instead, he found the key to unlocking the Stargate and accompanied Jack O'Neill's team to Abydos, so he could realign the Stargate on the other side. However, they found an extremely conspicuous distraction in the form of the ruthless Goa'uld Ra. After Ra was killed, Daniel remained on Abydos with Sha're, whom he had been unknowingly married to.
Daniel Jackson discoved an cartouche on Abydos, which he discovered charted a vast network of Stargates across the galaxy. When Jack O'Neill returned a year after the original mission, trouble also came in the form of Apophis, who kidnapped Sha're and made her a host to Amonet. Daniel was brought back to Earth and became a member of SG-1 with O'Neill and Samantha Carter. (SG1: "Children of the Gods") Shortly after their first mission on Chulak, Teal'c joined the team as well. (SG1: "The Enemy Within")
Jackson discovered that Ernest Littlefield had gone through the the Stargate in 1945 and convinced George Hammond to authorize a rescue mission. On the planet, dubbed Heliopolis, Littlefield showed Daniel a meeting hall containing information about an alliance between four alien species. Even though the whole structure was about collapse into the ocean, Jackson was more than a little reluctant to leave the planet. (SG1: "The Torment of Tantalus")
His teammates were made to think he was dead by Nem, an Oannes, who kidnapped Daniel to discover the fate of his mate, Omaroka. (SG1: "Fire and Water") Under the influence of her hypnotic breath, Daniel had sexual intercourse with Hathor in order for her to produce Goa'uld symbionts. Though he can't have any recollection of this, having lost all his memory of what happened while he was under Hathor's control, he is rarther repulsed by the knowledge. (SG1: "Hathor")
On a mission to P3R-233, Daniel discovered the Quantum Mirror and was transported to an alternate reality, where Earth was being annihilated by Apophis. (SG1: "There But For the Grace of God") Using information from this reality, SG-1 managed to prevent the same attack in our reality. (SG1: "Within the Serpent's Grasp")
After Jackson saved Shyla, the daughter of Pyrus, from suicide, SG-1 was imprisoned. Shyla, however, took personal responsibility for Daniel, with whom she was infatuated. Daniel became addicted to the Goa'uld sarcophagus and experienced severe withdrawal symptons when brought back to Earth. Once he was returned to his normal state, he convinced Shyla to destroy the sarcophagus. (SG1: "Need")
A year after joining SG-1, Jackson and Teal'c travelled to Abydos and discovered Sha're was pregnant with Apophis' child. After the birth, Amonet returned and rejoined Apophis. The child, a boy, was hidden away to prevent it from falling into Apophis' hands. (SG1: "Secrets")
On a planet where they were rescuing the Abydosians, Daniel again met Sha're/Amonet, who had stolen back her child. However, when Amonet used her ribbon device on Daniel, Teal'c was forced to kill her, but not before she gave Daniel a vision that explained how he needed to find the child, who, he discovered, was a Harcesis. (SG1: "Forever in a Day") He did find the boy on Kheb and discovered the Ascended, including Oma Desala, who he left the child in the care of. (SG1: "Maternal Instinct")
Daniel was reunited with his grandfather Nick when SG-1 discovered a crystal skull similar to one Nick had discovered in 1971. Nick chose to remain behind on the planet with the "giant aliens" they discovered there, so he could teach and learn from them. (SG1: "Crystal Skull")
When the Eurondans offered Earth their technology in exchange for heavy water, which would allow them to win a world war, Daniel Jackson protested, stating that they should find out more about the war before making the Eurondans their allies. Jack O'Neill didn't agree with him until he discovered the Eurondans were nazist. (SG1: "The Other Side")
On P3X-888, Daniel made friends with an Unas whom he named Chaka. (SG1: "The First Ones") When Jack O'Neill wanted to destroy a ship that was killing the Enkarans, Jackson again protested, as it would have wiped out the Gadmeer. He managed to convince Lotan to stop the ship's destruction of the planet and to relocate the Enkarans to another world. (SG1: "Scorched Earth")
When David Jordan, an old mentor of Jackson, died, Daniel attended his funeral and was reunited with his some of his old colleagues, including his ex-girlfriend Sarah Gardner. However, Gardner was taken over by the Goa'uld Osiris and escaped from Earth in a starship hidden in Egypt. (SG1: "The Curse")
On Abydos, Daniel again met his stepson, who he discovered had been genetically aged and was named Shifu. Jackson asked the boy for the information he possessed on the Goa'uld, but Shifu said Oma Desala had told him to forget the information. When Daniel tried to convince him to remember it anyway, Shifu gave him a vision that showed how Daniel would have been corrupted by the knowledge of the Goa'uld. (SG1: "Absolute Power")
About a year after first meeting him, Daniel's Unas friend Chaka was kidnapped by a civilization that used the Unas for slave labor. SG-1 freed Chaka, but Chaka chose to remain behind so that he could begin an Unas rebellion. (SG1: Beast of Burden)
Jackson impersonated Yu's servent Jarren at a summit of the System Lords. There he again met Osiris. (SG1: Summit) Osiris revealed that Anubis had returned and, realizing how powerful Anubis was, Daniel didn't carry through the Tok'ra's plan to kill off all the System Lords. (SG1: Last Stand)
Jackson again became angry with O'Neill for killing Reese in an effort to save the base from an infestation of Replicators. (SG1: "Menace") Daniel sacrificed himself to save the people of Kelowna from a naquadria bomb, but the dose of radiation was lethal and he died. However, with the help of Oma Desala, he Ascended. (SG1: Meridian)
Past and current romantic interests
- Sarah Gardner
- Sha're wife, deceased
- Hathor (not of his free will)
- Vala Mal Doran (love-hate relationship)