You may be looking for Ganatus.

Ganatus was a member of the Thal expedition which Temmosus led to the Dalek City in search of food only to be betrayed by the Daleks who murdered Temmosus.

After Dr. Who and Ian Chesterton convinced the Thals of the need to fight for their survival, Ganatus, along with Elyon and Antodus agreed to accompany Ian and Barbara on their expedition to seek another way into the city via the Daleks' water supply system.

Eventually, the party made it to the city and joined the others in defeating the Daleks. (NOTVALID: Dr. Who and the Daleks)

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