10) William Mason played by Thomas Howes (Downton Abbey)

Thomas Howes left Downton Abbey in Season 3. His character, William Mason, died during World War I. It was an emotional moment for the audience and the characters because it symbolized how the war affected families and communities. William's love story with his fiancée, Daisy, remained unwritten, and his leaving left a gap in the series that spoke of the brutal facts of the time. Howes's performance as a faithful servant is still dear to the hearts of the audience.
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Edited by Sarah Nazamuddin Harniswala