The Forth Generation (audio story)

 was the third and final story in the audio anthology Old Friends, produced by Big Finish Productions. It was written by Roy Gill and featured Christopher Eccleston as the Ninth Doctor, Jon Culshaw as Brigadier Lethbridge-Stewart and Warren Brown as Sam Bishop.

Publisher's summary
The Forth Generation have emerged. The Doctor, the Brigadier, Sam and Fiona are at their mercy. Is there a way to defeat them? Has UNIT learned from the past? And can the enemy’s nature be changed for the future?

Plot
to be added

Cast

 * The Doctor - Christopher Eccleston
 * Brigadier Lethbridge-Stewart - Jon Culshaw
 * Sam Bishop - Warren Brown
 * Fiona McCall - Elinor Lawless
 * Cameron Lawther - Martin Quinn
 * Foreman / UNIT Courier / Sergeant Lowe - Alexander Cobb
 * The Cybermen - Nicholas Briggs

Continuity

 * The Brigadier mentions the Cybermen's invasion of London and even walking up the steps of St. Paul's Cathedral. (TV: The Invasion)