The Isos Network (audio story)

 was the fourth and final story of the second season of The Early Adventures. It was written by Nicholas Briggs and featured the Second Doctor and Jamie McCrimmon, both voiced by Frazer Hines, and Zoe Heriot voiced by Wendy Padbury.

Publisher's summary
The Doctor, Jamie and Zoe are leaving Earth after having successfully defeated a Cyberman invasion… The Cyber-fleet is still exploding… But something is escaping through the mass of vaporising debris.

In hot pursuit, the Doctor and his friends find themselves drawn to a mysterious planet where strange beasts slither through the streets of a deserted city… And an old enemy lurks beneath the streets.

As a force of heavily-armed aliens arrives, a battle to save the entire galaxy from invasion begins.

Plot
to be added

Cast

 * Jamie McCrimmon/The Doctor/Narrator - Frazer Hines
 * Zoe Heriot/Narrator - Wendy Padbury
 * Seru - Rachel Bavidge
 * Enab - Richard James
 * Alam/Hilsee - Kieran Hodgson
 * The Cybermen - Nicholas Briggs

Continuity

 * 1) For the three travellers, this story takes place a few days after The Invasion .  The TARDIS has followed one of the Cyber Ships that managed to escape destruction.
 * 2) Jamie is reminded of the London underground during which he and the Doctor fought the Great Intelligence in The Web of Fear ; he hopes there are no Yeti here.