Dr. Martha Jones, later Martha Smith-Jones, was a British physician. She met the Tenth Doctor while in residency at Royal Hope Hospital in London when the hospital was transported to the Moon by the Judoon troops, after which she began traveling with the Time Lord. (Smith and Jones)
Unlike other companions, she not only became infatuated with the Doctor but also declared her feelings to him. She decided to stop travelling with him as he could not return her affection, but continued to have a number of adventures, both with and without him, thanks to her work with UNIT and Torchwood. (Last of the Time Lords, Reset)
Martha Jones was born in 1986 to Francine and Clive Jones. She had an older sister named Tish, a younger brother, Leo, and a niece, Keisha Jones, who was Leo’s daughter. When she was a child, Leo pushed Martha off the swing and broke her arm. Going in the ambulance and having her arm plastered fascinated her, which was when she decided she wanted to become a doctor. Martha grew up with her mother when her parents divorced, and was often forced to play peacekeeper in continual family arguments. Tish and Leo also lived with them, with Martha sleeping in their home’s smallest room. Martha devoured Annette Billingsley’s The Troubleseekers, a thirty-two book series, around the age of eight; they were the first books that she ever read. She later read Harry Potter and His Dark Instruments. Martha had three trumpet lessons in Year 6 of primary school.
When Francine invited guests to dinner, Martha and her sister were expected to “perform” for the guests by handing out nibbles while Francine bragged that Martha was going to be a leading surgeon. Martha hated the attention and it caused friction between her and Tish, who embraced the attention.
In 2007, she lost her cousin Adeola Oshodi, who worked for Torchwood One, in the Battle of Canary Wharf. (Army of Ghosts)
Working With Torchwood
Martha was later recruited by UNIT, something that she and Captain Jack believed happened because the Tenth Doctor put in a good word for her. She visited Torchwood Three in Cardiff as a UNIT officer, and soon became embroiled in their investigation of a medical organisation called the Pharm, acting as an undercover agent. Mayflies were put into her body when she was discovered and captured, prompting Owen Harper to twice save her life. Once with an alien surgical device to remove the Mayfly, and soon after by taking a bullet meant for her. (Reset)
Martha witnessed Owen’s return as an undead being through the resurrection gauntlet and gave him a posthumous physical. “Death”, a force possessing Harper, made the gauntlet attack Martha which aged her considerably, but reverted back again after Owen defeated the Death being. (Dead Man Walking)
She also mended Harper’s injured hand when, in a fit of self-destruction after Jack decided to relieve him of duty at Torchwood, he deliberately wounded it. She left once Owen Harper was returned to duty and resumed her work at UNIT. (A Day in the Death)
Martha attended both Owen and Tosh’s funerals.
She phoned Captain Jack when stationed at the CERN Facility in Switzerland when the Large Hadron Collider was scheduled to be activated. Some of the staff had gone missing, including her old friend Julia Swayles. The Torchwood 3 team went to Switzerland to investigate and found the person who was responsible was Dr Harrington.
End of UNIT Career and Freelance
After Earth was returned to its proper place, Martha exited the TARDIS with Jack Harkness, who offered her a job with Torchwood. She did not take Jack’s offer to work for Torchwood. (Journey’s End)
However, she stopped working for UNIT as a permanent member of staff. She occasionally went back to UNIT, filling in for her friend Malcolm Taylor as London’s scientific adviser.
By the time the 456 incident began, she was on her honeymoon. (Children of Earth: Day One)
She decided to go into “freelance” alien fighting with Mickey Smith, whom she had, at some point, married. One adventure saw Martha and Mickey battle a Sontaran, Jask. Unknown to them, Jask had them cornered and was about to kill them. The Doctor stepped in and knocked out Jask, saving them as his final gift to them prior to his next regeneration. Martha spotted the Doctor. They called out to him, but he walked away without saying a word. As the TARDIS left, Martha embraced her husband sadly. (The End of Time)
At some point, Sarah Jane Smith and Martha started to occasionally meet up for coffee. They became friends. Sarah Jane told Martha everything about her son Luke Smith. In 2010, Luke Smith was starting to get nightmares and didn’t feel well. Sarah Jane thought that Martha could help and wanted to call her. However Luke told her that he was alright and Sarah Jane didn’t call Martha. A short time later Martha and her husband Mickey came to Luke’s farewell party after which Luke wanted to go the University of Oxford.
Martha called in the Eleventh Doctor to assist the Japanese branch of UNIT with investigating a mysterious beverage. This was Martha’s first interaction with the eleventh incarnation of the Doctor.
Martha was an intelligent, brave and kind-hearted woman with a great sense of humor. When she was a prisoner of the Daleks, one of them confirmed that she possessed high intelligence. (Daleks in Manhattan) The Doctor was impressed with her theory about having air on the Moon, and he asked her to join him in the hospital balcony to see if they could breathe. (Smith and Jones) She rose to every challenge the Doctor gave her: watching after him while he was human, and walking the world for a year. (Human Nature, Last of the Time Lords)
Martha was willing to accept and defend non-humans as friends. She greeted unusual looking species with wonder and even treated injuries. (Utopia, The Doctor’s Daughter) She quickly adapted pattern of speech and gesture to communicate more effectively with other species. (Daleks in Manhattan, The Doctor’s Daughter)
Martha quickly developed a crush on the Doctor and always wondered if he even noticed her. Martha was envious of Joan Redfern when the Doctor made himself a human named John Smith and fell in love with her. (Human Nature, The Family of Blood)
In the Year That Never Was, Martha admitted that she loved the Doctor, but after the Master’s defeat, she decided that holding on to the hope that he would return her feelings was not good for her. Her feelings for him, in addition to the enormous ordeal she had been put through, strained her relationship with the Doctor to the point that she decided to leave the TARDIS. (Last of the Time Lords) She was later engaged to Tom, but eventually married Mickey Smith instead. (The End of Time)
Her time walking the Earth gave rise to a more soldier-like and less naive side of Martha. Nevertheless, she retained her kindness, sense of adventure, and fierce determination to do the right thing. Despite their strained relationship, she remained loyal to the Doctor, and indeed took many of his teachings to heart. For instance, despite her work at UNIT, she very rarely carried a gun. She explicitly stated that by working inside UNIT, she might be able to change it for the better.(The Sontaran Stretegem, The Doctor’s Daughter)
Although she had cause to be jealous of Rose Tyler, Martha seemed genuinely happy for the Doctor when he and Rose were reunited. She got along very well with Donna Noble. After the Year That Never Was, Martha became a close friend of Captain Jack Harkness and although she did not seem to return his overtures, she did not mind when he flirted with her. (Utopia) She even kissed him when she left her temporary assignment to the Torchwood team, claiming that “everyone else has had a go.” (A Day in the Death)