In the 1960s, he turned to directing television programmes, including episodes of The Avengers, Armchair Theatre, Out of the Unknown, and the BBC serial The Three Musketeers (1966).

The producer Leonard White and series creator Sydney Newman both congratulated him on giving the early episodes their distinctive visual style, and Patrick Macnee credited him as a major influence in the shaping of the character of John Steed.

[3][4] Hammond’s one foray into film as a director saw him directing James Mason in Spring and Port Wine (1970), based on the play of the same name by Bill Naughton and set in the Lancashire town of Bolton.

[5] Hammond continued to direct many television series of the 1970s, 1980s, and 1990s, including King of the Castle, a production of Wuthering Heights for BBC Television in 1978, The Dark Angel for BBC2, Rumpole of the Bailey, Follyfoot, The Wednesday Play, Cold Comfort Farm in 1968, Tales of the Unexpected, The Little World of Don Camillo, The Return of Sherlock Holmes, Inspector Morse and many more.

Peter Neill, a colleague who worked with Hammond on various productions of the time, remembers him as "very efficient, yet creative, with a friendly manner and sense of humour".