Previous work for CBBC included gameshow "Crush" in 2004, "Sport Relief Gets Sub'd!", a Sport Relief 2006 show and as co-presenter of "Smile", which aired each Sunday on BBC Two until 26 August 2007 and saw him win a Children's BAFTA for best presenter. He also co-hosted the "Doctor Who" tie-in programme "Totally Doctor Who" until it was cancelled after series three in 2007. Harwood was also the Control Voice in an episode of the "Doctor Who" spin off animated series "The Infinite Quest". As an extra, he appeared in the "Doctor Who" episode "Love & Monsters", which was first transmitted on 17 June 2006.