In 1991 Harding took part in the series "Time Signs", which was produced by Tim Taylor, who went on to create Channel 4's popular archaeology series "Time Team". Harding was a regular on "Time Team" from the first series in 1994 until its cancellation in 2013. He also took part in the various spin-off series such as "Time Team Extra" (1998), "Time Team Digs" (2002) and "Time Team Live". In addition, he has appeared in episodes of "Meet the Ancestors" (2003) and "Chris Moyles' Quiz Night" (2009).