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DESCRIPTION: (from TLC's press release, November 2018) TLC's Emmy Award-winning series, WHO DO YOU THINK YOU ARE? returns on Monday, December 3 at 10:00p.m. ET/PT, with four new episodes featuring celebrities tracing their family history, as they dive into their past and explore their connection to generations that came before them. With the help of Ancestry.com and historical documents, these stars get the opportunity of a lifetime and embark on exciting missions to discover their own heritage. For some, that may mean tracing back several generations to distinct moments in world history.