He was in an episode of 'The Protectors' and as Hilts says played Det. Supt. Steve Hackett in the 1977 series 'Target'
http://www.imdb.com/title/tt0075593/
He was also in two episodes of the second series of 'The Sweeney', playing one half of an Australian duo of blaggers (Colin & Ray) alongside George Layton.
He also starred in an exceptionally frightening Ghost Story series in the mid/late sixties, called Tales of Mystery and Imagination. Scared me witless, but I was only 10. He did the narritive at the beginning of every episode, and also stared in the stories.