Thomas Lawrence Knight (born 22 January 1993),[1][2] usually credited as Tommy Knight, is an English former actor best known for playing Luke Smith in The Sarah Jane Adventures and Doctor Who, Kevin Chalk in the original run of Waterloo Road, Cal Bray in Glue and Archibald Brodie in Victoria.

[citation needed] Knight was in a relationship with Waterloo Road co-star Abby Mavers from 2012 to 2017.

[13] 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.

[14][non-primary source needed] He joined Waterloo Road in 2012, first appearing in episode 8 of series 8 playing Kevin Skelton.

He later played Hall Boy Brodie in Victoria, a period drama starring Waterloo Road and Doctor Who alumnus Jenna Coleman.