Film:
* The Day the Earth Caught Fire (1961) as Dr. David Bradley
* The Long and the Short and the Tall (1961) as Captain John Graham
* The Man Who Haunted Himself (1970) as Harold Pelham
* The Abominable Snowman (1957) as Dr. John Rollason
* The League of Gentlemen (1960) as Roger
* The Two Faces of Dr. Jekyll (1960) as Dr. Henry Jekyll
Television:
* The Adventures of Robin Hood (1955-1959) as Little John (1957-1959)
* The Prisoner (1967-1968) as Number Two (1967)
* The Avengers (1961-1969) as John Steed (1 episode, 1961)
* Dixon of Dock Green (1955-1976) as Sergeant George Dixon (1 episode, 1962)
* Danger Man (1960-1968) as John Drake (1 episode, 1964)
* The Saint (1962-1969) as Simon Templar (1 episode, 1964)
* The Wednesday Play (1964-1970) as Various Roles (4 episodes, 1964-1969)
* The Forsyte Saga (1967) as Soames Forsyte (1 episode, 1967)
Other Notable Works:
* The Shadow of the Cat (1961) as Mark Trevor
* The Horror of Frankenstein (1958) as Inspector (uncredited)
* The Quatermass Xperiment (1955) as Professor Bernard Quatermass (1 episode, 1955)
This is not an exhaustive list, but it covers some of his most prominent roles. Ian Hendry was a versatile actor who appeared in a wide range of genres, but he was perhaps best known for his strong presence and his ability to portray both heroes and villains.