The case of computer hacker Gary McKinnon returns to the High Court today.
Judges are expected to give directions for a hearing due to take place later this month in the latest phase of his marathon legal battle against extradition to the United States.
The US authorities want him to face trial for hacking into military computers 10 years ago.
Mr McKinnon, from Wood Green, north London, was first arrested in 2002 and there are fears he faces up to 60 years in jail if convicted of hacking charges.
He admits hacking but claims he was looking for evidence of UFOs.
In January, the High Court expressed concern over how long the case was taking to return to court, with two judges listing it for a hearing later this month in a bid to speed matters up.
Arrested in 2002, and then again in 2005, an order for his extradition was made in July 2006 under the controversial 2003 Extradition Act between the UK and the US.
Critics claim it is one-sided and favours the US, but an independent review by former Court of Appeal judge Sir Scott Baker last year found it was both balanced and fair.