Thomas Lawrence "Tommy" Knight (born 22 January 1993, Chatham, Kent) is an English actor best known for playing Luke Smith in The Sarah Jane Adventures.
He started in West End Theatre with Deborah Warner's production of Euripides' Medea, (Queens Theatre, 2001), and has since appeared in Chitty Chitty Bang Bang, (London Palladium, 2002), The Snowman, (Peacock Theatre, 2003), The Full Monty, (UK National Tour, 2004) and the Royal Shakespeare Company's Macbeth (Albery Theatre, 2005).
Additional television performances include roles in TV to Go, (BBC, 2002), Casualty, (BBC, 2005 and 2008), The Impressionists, (BBC, 2006), Sorted, (BBC, 2006), Doctors (BBC, 2006), and The Bill (Talkback Thames, 2006 and 2009), and Myths (BBC, 2008).
Knight is best known for playing Luke Smith, adoptive son of Sarah Jane Smith, in the first three series of The Sarah Jane Adventures (2007, 2008, 2009) and in the 2008 Doctor Who episodes "The Stolen Earth" and "Journey's End". He was featured in the second part of The End of Time, the two-part 2009 Doctor Who Christmas specials. He was written out as a regular on The Sarah Jane Adventures in the first serial of the fourth series in 2010, when Luke drives off to Oxford University, however he continued to make semi-regular appearances in the show up to the end of the fifth and final series, usually via webcam from his dorm room. His final appearance was in the show's final episode, "The Man Who Never Was".
He has also featured in a CEOP e-Safety Video 'Tom's Story', which can be found on YouTube
Tommy Knight will feature in a darker role than usual in an independent UK horror film due for release in 2012 entitled A Suburban Fairytale, in which he will act alongside real life half-sister Yohanna Farrel in an incestuous and murderous role.
Tommy is in Waterloo Road Series 8, which started August 23rd 2012, and he first appears in Episode 8. He plays a boy called Kevin Skelton who is in care, and has a history of moving around different schools and foster homes a lot. Kevin is more intelligent than he lets on, and forms a bit of a bond with the maths teacher Mr Chalk, who in Episode 10 he asks to be fostered by, to which Mr Chalk says yes.