The Doctor deduces that the Master was planning to steal this energy to gain a new cycle of regenerations; however, if the Eye is disrupted, Gallifrey will be destroyed and a hundred other worlds will be consumed in a chain reaction.
The Master was planning to steal this energy to gain a new cycle of regenerations. This is what the Doctor deduces. Gallifrey will be destroyed. This was however. The Eye is disrupted. A hundred other worlds will be consumed in a chain reaction. This was however.