Buddhism
From Tardis Wiki, the free Doctor Who reference
Buddhism was an Earth religion whose adherents followed the teachings of Buddha.
Among the prizes that the Doctor obtained during a game of backgammon against Kublai Khan in the 13th century was the sacred tooth of Buddha which Marco Polo had brought from India. (DW: Marco Polo)
The monks at the Det-Sen Monastery in Tibet were Buddhist. (DW: The Abominable Snowmen)
K'anpo Rimpoche became the abbot of a Buddhist meditation centre in England. (DW: Planet of the Spiders)
In an alternate timeline, UNIT takes over a Buddhist temple just outside of Hong Kong during the Handover, while trying to secure The Master from China. (DWU: Sympathy for the Devil)
