Are John Paddy Carstairs and Robert Hamer both film directors?
Robert Hamer Robert James Hamer (31 March 1911, Kidderminster, Worcestershire – 4 December 1963, London) was a British film director and screenwriter.
John Collin (actor) John Collin (18 October 1928 – 25 February 1987) was a British actor frequently seen on UK television during the 1960s and 1970s, mainly in supporting roles. Collin's best-known role was as Detective Sergeant Haggar in the long running BBC police series "Z-Cars". Another notable role was as Guardian officer Tom Weston in the 1971 ITV political fantasy "The Guardians".