His early work was in comics, as the writer of the James Bond stories Silent Armageddon (1993, drawn by John M. Burns) and Shattered Helix (1994, drawn by David Jackson, over layouts and with colouring by David Lloyd) and as a contributor to 2000AD.
He has worked on feature-length adaptations of children's fiction and has written scripts for a number of computer games, including the best-selling Fire Warrior and the landmark game/internet serial Halcyon Sun (with Jonathan Clements).
Jowett's broadcast television work includes Shane the Chef, which he co-created, A.T.O.M.
(Jetix/Toon Disney), Chop Socky Chooks (Aardman Animations), Zula Patrol (Zeeter Productions), Pitt & Kantrop (Millimages), The Way Things Work (Millimages) and episodes of Bob the Builder (HIT Entertainment).
He is also the author of two novels and several children's books, including movie tie-ins to Finding Nemo and Wallace and Gromit.