Bonnie Langford

When the Doctor and Mel arrive in the Space Trading Colony, Iceworld, the Doctor can feel that there is mischief afoot. He and Mel don't have to wait long before they discover the culprit, Sabalom Glitz. Glitz is hot on the trail of hidden treasure, and the Doctor decides to join him. Down in the Ice Passages they go - through the Ice Garden, past the Singing Trees, beyond the Lake of Oblivion - in search of the Dragon's Treasure. But the Doctor and his companions don't know the true worth of this mythical hoard. Only Kane, the most feared man in Iceworld, knows the secret of the Dragonfire...

Assailed by violent bolts of energy, the TARDIS is blasted off-course and forced to land on the barren planet of Lakertya. The turbulence triggers the Doctor's sixth regeneration - but that is the least of his worries. Why has the Rani, that ruthless renegade Time Lady, brought the Doctor to Lakertya? What are the hideous Tetrap guards? Who are the 11 geniuses she has imprisoned in her stronghold, and what is the vital significance of Strange Matter? Aided by the faithful Mel, the Doctor must do all he can to stop the Rani's diabolical scheme before it affects the whole of creation