Computer (Dr. Who For Keep Australia Beautiful)

A computer onboard a space station tried to judge the extent of the Fourth Doctor's knowledge of Australia. While the Doctor proved that he knew a great deal about the country, despite the computer believing that the Doctor knew nothing, it was able to catch him out when a new data-scan revealed that Australia was in danger due to pollution. This emboldened the Doctor, and he asked to leave, which the computer seemingly allowed. (TV: Dr. Who For Keep Australia Beautiful)

Behind the scenes
As no end credits were present in Dr. Who For Keep Australia Beautiful, the voice actor for the computer is currently unknown.