Mickey

Mickey Smith was the former boyfriend of Rose Tyler, before being left as Rose went on her journey with the Doctor. He also found his way on the TARDIS, but decided to stay on an alternate Earth. He returned to Earth on two occasions, and the second time he decided to stay. He met and married Martha Jones.

Biography
Mickey Smith was Rose Tyler’s boyfriend when she first met the Doctor during the Nestene invasion. Swallowed by a Nestene-controlled whellie bin, held captive in the alien’s lair and duplicated, Mickey’s usually laid-back attitude crumbled – terrified, he was automatically suspicious of the Doctor who Rose had hooked up with. For Mickey, being abandoned by his girlfriend was made worse when Rose’s disappearance led to 12 months of suspicion from Jackie, his neighbours and the police, but he stayed loyal to her. When the Doctor and Rose returned, Mickey’s computer skills played a vital part in defeating the Slitheen and the Doctor, who had constantly teased him by getting his name wrong and calling him an idiot, recognized this and offered him a place in the TARDIS. Mickey refused, though he later thought better of it and joined them after all. This led him to a parallel Earth, where he saw his own double killed by Cybermen. Finding his gran was alive on parallel Earth, fed up on being regarded as ‘the tin dog’, and realizing that Rose would never leave the Doctor for him, Mickey elected to stay there joining a fight against the Cybermen which would eventually lead him back to our universe.

Three years passed, from Mickey's perspective, in which he continued to battle the Cybermen. When the Cybermen began to cross the Void to Mickey and Rose's home universe, Mickey was the first to travel back to his original universe (and back three years) in order to defeat them and ensure Rose's safety. He went undercover at Torchwood 1, pretending to be a scientific assistant, and showed far more confidence than before. However, when the sphere, which he believed would contain some form of Cyber-Leader, opened to instead reveal the Cult of Skaro, Mickey's skills were put to the ultimate test as he took part on the fringes of the Battle of Canary Wharf. The Doctor trapped Cybermen and Daleks in the Void and Mickey was left in the parallel universe with Rose, Jackie and Pete Tyler.

After Rose Tyler left Pete's World to find the Doctor, Mickey and Jackie Tyler, crossed over themselves and arrived on Earth a few days after it was relocated to the Medusa Cascade. Upon arrival, Mickey and Jackie immediately open fire on a group of Daleks preparing to exterminate Sarah Jane Smith. Mickey has a happy reunion with the woman responsible for getting him a chance to travel with the Doctor, telling her "We Smiths have to stick together". He later accompanied Sarah Jane and Jackie aboard the Crucible where he was also reunited with Jack Harkness and, ultimately, the Doctor and Rose (later, the Clone Doctor also greeted him warmly). There appears to be little interaction between Rose and Mickey during the remainder of the adventure, suggesting possible estrangement. After the Earth was restored to its proper place, Mickey left the TARDIS after a tearful goodbye with Jackie. He explained to the Doctor that there was nothing for him on Pete's World anymore, "certainly not Rose" and that his Gran had passed away after living out her final years living in Pete Tyler's mansion. He then ran to catch up to Jack Harkness and Martha Jones as they left for their own future adventures.

Family

 * Martha Jones - Wife
 * Gran - Grandmother (deceased)