The 14 part Doctor Who story The Trial Of A Timelord is being released on DVD in the UK on August 18th 2008. Nicola provides commentary on the first 8 episodes.
The DVD features a host of extra features including an an hour long documentary: Trials and Tribulations, produced by Ed Stradling, which looks at Colin Baker's tenure as the Doctor.
Full details including a list of all the extras can be found at The Restoration Team website: