|Edition: || UK (VHS)|
|When: ||June 2003|
|Format: ||1 x VHS|
The peaceful planet Aneth was once at war with the mighty Skonnon empire. Now the Skonnon ships have returned to the skies of Aneth, demanding tribute. But as the final consignment is being taken to Skonnos, an accident forces the ship off course...
The Doctor decides that the TARDIS is in need of an overhaul, and after materialising in deep space dismantles most of the ship's key circutry, immobilising the time/space machine. Nearby is the stricken Skonnon spacecraft, and both ships are seemingly caught in a gravity field that could destroy them...
On the planet Skonnos, the mysterious Nimon lives in a labyrinthine complex, promising a great future for the Skonnon empire on receipt of the tribute from Aneth. But what does the Nimon plan for itself...?
This story was broadcast on BBC1 between 22 December 1979 - 12 January 1980.