Thomas David Watkins (c.1876 – ?) is a fictional character in the ITV drama Upstairs, Downstairs and its spin-off Thomas & Sarah. He was portrayed by John Alderton.
Thomas Watkins was born in about 1876, the fifth of seven children, and grew up in Wales. In June 1909 he responded to an advert for the position of manservant to Lawrence Kirbridge. When newly-married Elizabeth arrived with Rose at her new home in Greenwich, Thomas was waiting outside her new house. He soon struck up a friendship with Rose, and the two witnessed the collapsing marriage of Lawrence and Elizabeth. When the two separated six months later, Lawrence was given an allowance and sent to travel the world and he wanted to take Watkins with him. However, Thomas decided to stay and became chauffeur to the Bellamy's at Eaton Place.
From the moment Thomas Watkins came to Eaton Place, he and Sarah quickly became close. They joined forces to defeat an Irishman who was trying to blackmail the Bellamy's, and their closeness resulted in her becoming pregnant. Sarah told everyone that this was the result of an encounter with a gentleman while she sheltered from the rain. Thomas then offered marriage to solve the problem, and went to Richard Bellamy to ask permission to do so. He liked the idea, as it would solve many problems, and gave Thomas £500 to start his own garage. Thomas always had ambitions above domestic service, and he and Sarah left service when they received the £500. They returned to visit the servants and to give Lady Marjorie a birthday present, on 6 May 1910. The subsequent celebration downstairs ended when the news of Edward VII's death broke.