The Not-So-Sinister Sponge (short story)

Summary
The Doctor, Romana, and K9 arrive on an uninhabited planet made up entirely of confectionery. K9 seems in a bad mood, and Romana realises that it is K9's birthday. To celebrate the occasion Romana takes the Doctor's TARDIS to fetch a dedicated sponge cake from the Masterbakers of Barastabon. After a brief time storm-induced detour to the planet Kendrax during which she ably foils an alliance of the Master, the Daleks, and the Cybermen, she returns with the cake.

K9 is cheered by the gesture, but before the trio cut the cake it comes to life and asks politely not to be eaten. The Doctor theorises that the unique combination of a trip in the TARDIS, exposure to the telepathic circuits, and the unusual properties of the confectionery planet brought the Cake to life. At K9's suggestion, they release the Cake to live out its life on the confectionery planet.

Characters

 * Fourth Doctor
 * Romana II
 * K9 Mark II
 * The Cake

Continuity
to be added

Timeline

 * This story occurs after ST: Return of the Spiders
 * This story occurs before ST: Special Occasions: 2. Do You Love Anyone Enough?