From Big Finish, quote;
"During a skirmish with a small patrol of Federation pursuit ships, Orac is badly damaged. There is only one person who can repair the super-computer: Federation Doctor Brynn Pellas.
Avon and Tarrant take Orac to her base, unaware that the planet she lives on is now under the control of the Terra Nostra - and Pellas is in the crime syndicate's back pocket.
Pellas can repair Orac - but first, the Liberator crew must steal a secret Federation weapon for the Terra Nostra. Codename: Zero Point." Unquote
Available here and now: https://www.bigfinish.com/releases/v/the-terra-nostra-zero-point-novel-and-ebook-2734
Rocco
Outpost Gallifrey News
Chicago
"During a skirmish with a small patrol of Federation pursuit ships, Orac is badly damaged. There is only one person who can repair the super-computer: Federation Doctor Brynn Pellas.
Avon and Tarrant take Orac to her base, unaware that the planet she lives on is now under the control of the Terra Nostra - and Pellas is in the crime syndicate's back pocket.
Pellas can repair Orac - but first, the Liberator crew must steal a secret Federation weapon for the Terra Nostra. Codename: Zero Point." Unquote
Available here and now: https://www.bigfinish.com/releases/v/the-terra-nostra-zero-point-novel-and-ebook-2734
Rocco
Outpost Gallifrey News
Chicago