Novak initially appeared on various British shows such as Family Affairs, Holby City, and Spooks. In 2005, he and Ed Tracy created Fonejacker, a prank call show as part of Channel 4's Comedy Lab strand. After the pilot, he was given a Christmas special and a six-part series, which began airing on 5 July 2007 on E4 and 7 September 2007 on Channel 4. In November 2009, he appeared on the Channel 4 show The Increasingly Poor Decisions of Todd Margaret, playing a bomb disposal officer. In April 2010, Novak began appearing in a spin-off of Fonejacker called Facejacker, in which he adopted various disguises, including several characters heard in Fonejacker. Novak announced on BBC Radio 1 in May 2012 that the character Terry Tibbs, a mainstay of both shows, would be getting a spin-off chat show which aired in August 2012. Novak played Simon in the Channel 4 sitcom pilot Bad Sugar.