by Rob Nisbet
The Edge is the galaxy’s scientific hub of experimentation, theoretical breakthroughs and invention – just the sort of place to interest the Doctor and Zoe. However, a secret lies hidden in The Edge laboratories. Jamie instinctively knows that something is wrong, and it doesn’t take long for him to be proved right....
Frazer Hines (Jamie McCrimmon), Wendy Padbury (Zoe Herriott), Robert Whitelock (Curtis)
Directed by Lisa Bowerman
*Featuring the Second Doctor, Jamie and Zoe
*A Big Finish Audio Production
*Time-placing: this story takes place after 'The Invasion'