Alan Jackson

Alan Jackson was the father of Maria Jackson and ex-husband of Chrissie Jackson. He was a neighbour to Sarah Jane Smith before he moved to America.

Biography
As a youth, Alan Jackson loved to skateboard, and even showed off his skateboarding skills when he was older. (TV: Whatever Happened to Sarah Jane?) During the 1980s, he and Chrissie Jackson went around taking part in a treasure hunt for a 'golden rabbit'. (TV: Warriors of Kudlak)

He was, by trade, a computer security consultant. As a result, he had considerable computer expertise, particularly in systems penetration, a.k.a. "hacking", as well as some unorthodox contacts. (TV: The Lost Boy, The Mark of the Berserker)

Despite being divorced from Chrissie, Alan remained on fairly amicable terms with her and had frequent contact with her. They turned to each other on several occasions.

Before Alan moved to Ealing, he had a job at St Cheldon's Comprehensive School in Upminster. He noticed a strange metallic smell coming from the technology block Coldfire Construction had built. (TV: Revenge of the Slitheen)

At the end of summer 2008, Alan moved into 36 Bannerman Road in Ealing opposite Sarah Jane Smith's house, number 13. Unlike his daughter and ex-wife, Alan was affected by the Bane ingredient in Bubble Shock!. (TV: Invasion of the Bane)

After Maria's first day at school at Park Vale School, Alan lent Sarah Jane the plans for St Cheldon's' technology block, including an empty room Coldfire kept to themselves. (TV: Revenge of the Slitheen)

He was briefly turned to stone by the Gorgon, though he retained no memory of this event. (TV: Eye of the Gorgon)

When his daughter was erased from history by the Trickster, only Alan could remember her thanks to an alien device given to Maria by Sarah Jane, which in turn came from the Verron soothsayer. When he interrogated Andrea Yates about Maria's disappearance, the Graske chased him and tried to remove him from time. However, Alan trapped the Graske and forced it to tell him where Maria went. When the day was saved, he was very surprised to find out what his daughter had really been doing with Sarah Jane Smith. (TV: Whatever Happened to Sarah Jane?) His eyes now opened to the existence of alien life forms, Alan at first experienced a knee-jerk reaction which led him to consider selling his house and moving Maria away from Sarah Jane. He soon changed his mind and assisted his daughter and Sarah Jane in defeating Mr Smith's attempt to destroy the world. (TV: The Lost Boy)

In 2009, Alan and Maria were holidaying in Cornwall when the Earth was relocated to the Medusa Cascade and subsequently invaded by the Daleks. (TV: The Stolen Earth)

Alan was offered a new job at the head offices of his firm in America. He accepted, and soon afterwards, he and Maria moved to Washington, D.C. (TV: The Last Sontaran)

Although living on another continent, Alan and Maria were still able to assist Sarah Jane from time to time. (TV: The Mark of the Berserker)

He and Maria were invited to Sarah Jane's wedding, but he could not attend due to work obligations. (TV: The Wedding of Sarah Jane Smith)