At the Top of the Mountain - S2.E26

Tripitaka has an ominous dream that his mother is dying, and becomes very preoccupied the next day. Concerned about his master, Monkey cloud-flies back to China, and finds Tripitaka's mother, Wing-Chow, infected with a deadly plague. Just before dying, she tells Monkey that her son, original name Hsüan Tsang, must continue his journey to India. Monkey returns and impersonates Wing-Chow, to pretend she's alive, fearing that Tripitaka would stop his journey and return to China if he knew the truth.