Suzie Costello

Suzie Costello was a member of Torchwood Three in the early 21st century up until late 2007 when she committed suicide.

Although she wasn't alone in having used Torchwood-acquired technology to her own advantage, she had been the most destructive. Suzie, unlike her other teammates, had malicious ulterior motives and carried them out through secret gambits. Despite her troubled life, she harbored a sadistic cruelty that led to her early demise. However, Suzie's influence continued to cause bedlam after her death, through a plan to resurrect herself should she perish, which was eventually undone. She would be revived yet another time by alien technology, only to face a final death beyond any hope of return.

Biography

Costello loathed her father. She had an affair with Owen Harper. When she joined Torchwood Three she was on the run and had wiped her files clean. She placed triggers on Pilgrim member Max, using retcon that would lead to her resurrection with the resurrection gauntlet three months after her death.

The gauntlet worked particularly well on the victims of violent deaths, and more so on injuries inflicted by the life knife. In 2007, Costello committed a series of murders with the life knife to improve her use of it. She was discovered by PC Gwen Cooper. Her attempt to kill Jack Harkness in her escape was thwarted when Jack's immortality was revealed. Suzie took her own life. This was another step in her plan to revive herself. Costello's body was placed in the Torchwood cryo-chambers and her worldly possessions collected and placed into storage as was common practice for deceased Torchwood operatives.

Three months after her death, Max committed murders, marking corpses in blood with the word "Torchwood" to draw Torchwood's attention. After discovering her involvement with Pilgrim, Torchwood decided to revive Costello, ironically with the very resurrection gauntlet that Costello had killed for earlier. Gwen wielded the glove this time, but rather than reviving Costello for only a few minutes as usual, the glove revived her apparently permanently. This left Torchwood in a quandary since they now had a dead person who had come back to life, yet among other things still had a severe head injury caused by the suicide bullet. Unknown to the team, Costello had foreseen this and through a mental link in the glove, Gwen was forced to transfer part of her essence, which Costello used to heal her injury, an action which slowly killed Gwen.

Seeing the effects on Gwen, Jack asked Costello to give up her restored life. She refused. Faced with Gwen's imminent death, Jack shot Costello down in cold blood. However the link via the gauntlet prevented Costello from dying. Only after Jack ordered Toshiko Sato to destroy the gauntlet did Costello die again. Her body was returned to the cryo-chamber.

A bomb planted inside Jack destroyed much of the Hub in 2009; it is not known if any of the cryo-chambers survived the blast.

Despite the fact that much of Suzie's actions fell into her own failed grand plan, Harkness later stated that he felt responsible for her death.

Biography from the TARDIS Data Core article, licensed under CC-BY-SA