In 1970 he also wrote for the fantasy series Ace of Wands, and later in the decade contributed to the soap opera Emmerdale Farm.
Hammond is best known for the creation of the science-fiction fantasy series Sapphire & Steel,[1] produced by ATV and screened on the ITV network in the UK from 1979 to 1982.
His story, titled Paradise Five, was liked by then-script editor Eric Saward, but rejected by producer John Nathan-Turner while the script was still being worked on.
The script was later revived in 2009–2010 by Big Finish Productions for a full cast audio drama, Paradise 5, with the final script written by both Hammond and new material by Andy Lane, starring the Sixth Doctor (Colin Baker) and his companion Peri Brown (Nicola Bryant).
His episode, "Small Worlds", was shown on 12 November 2006, directly opposite one of his Midsomer Murders scripts, "Dance with the Dead", on ITV1.