The Android Maker of Calderon IV (short story)

Summary
Five years ago, Sarah Jane Smith and the Third Doctor visited Calderon IV and met the Android maker, whom they defeated in an hour and a half. The Doctor left a signal device behind in case they were needed again.

The android maker makes a perfect replica of the Doctor, which he programs to murder and replace the Doctor so that he can have an audience with Praesidium and assassinate him with an explosive in his head. However, the android turns out useless when it turns out the Doctor had regenerated.

Characters

 * Fourth Doctor
 * Sarah Jane Smith
 * Android maker
 * Android version of the Third Doctor

Continuity
to be added

Timeline

 * The Android Maker of Calderon IV occurs after ST: Eternity
 * The Android Maker of Calderon IV occurs before TVC: Dredger