Peter J. Hammond (born c. 1930s; sometimes credited as P. J. Hammond) is a British television writer.
Hammond's television career began in the 1960s, when he began by working on BBC police dramas such as Dixon of Dock Green and Z-Cars, on the latter of which he served as script editor for a year from 1969 to 1970. In 1970 he also wrote for the fantasy series Ace of Wands, and later in the decade contributed to the soap opera Emmerdale Farm. He also continued to write for crime and police dramas, penning episodes of The Sweeney. He also created the offbeat 1984 sitcom Lame Ducks.
In the 1980s and 1990s, Hammond wrote for popular ITV police/detective shows The Gentle Touch, The Bill and Wycliffe, as well as for Doctor Finlay, the new production of the 1960s BBC series Dr. Finlay's Casebook. He returned to the science fiction genre by writing an episode of the 1998 Sky One series Space Island One, although his episode was ultimately one of those that went untransmitted until 2002.
Work in the 2000s included many episodes of the popular murder mystery series Midsomer murders.
He is best known for the creation of the science-fiction fantasy series Sapphire & Steel, produced by ATV and screened on the ITV network in the UK from 1979 to 1982. Hammond, who had conceived the series after spending an evening in a supposedly haunted house, wrote five of the six serials that made up the programme, as well as a novelisation of the first serial.