You may be looking for one of several individual viziers.

The Doctor encountered several viziers, both on and off Earth.

In the 9th century, the Fifth Doctor encountered the Sudanese vizier. (AUDIO: The Destroyer of Delights)

In 1289, the First Doctor encountered Kublai Khan's vizier at Khan's palace. (TV: Marco Polo)

While in Paris in 1626, Erimem told King Louis XIII that the Fifth Doctor was her vizier. (AUDIO: The Church and the Crown)

The Third Doctor encountered the Sclaponian Grand Vizier. (PROSE: Island of Death)

The Eighth Doctor encountered the glass Vizier of Fortalice. (PROSE: The Scarlet Empress)

In 2593, Bernice Summerfield encountered an individual who called himself the Vizier, whilst on Perfecton. (PROSE: Oh No It Isn't!)

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