William Tulloch Paterson is a Scottish actor with a career in theatre, film, television and radio. Throughout his career he has appeared regularly in radio drama and provided the narration for a large number of documentaries. He has appeared in films and TV series including Comfort and Joy (1984), Traffik (1989), Auf Wiedersehen, Pet (1986), Truly, Madly, Deeply (1990), Wives and Daughters (1999), Sea of Souls (2004–2007), Amazing Grace (2006), Miss Potter (2006), Little Dorrit (2008), Doctor Who (2010), Outlander (2014), Fleabag (2016–2019), Inside No. 9 (2018), Good Omens (2019), and Brassic (2020). He is a recipient of the Lifetime Achievement Award of the Scottish BAFTAs.

Little Dorrit is a 2008 British miniseries based on Charles Dickens's serial novel of the same title, originally published between 1855 and 1857. The screenplay is by Andrew Davies and the episodes were directed by Adam Smith, Dearbhla Walsh, and Diarmuid Lawrence.