Partridge’s father was a diplomat in the British Foreign Service. In 1943, when he was only seven years old, Partridge and his nanny in Lisbon, Portugal boarded BOAC Flight 777 bound for Bristol in the United Kingdom. Before the flight departed Partridge and his nanny were forced to give up their seats for so that British actor Leslie Howard and his agent Alfred T. Chenhalls could board the plane. BOAC Flight 777 was later shot down over the Bay of Biscay by the German Luftwaffe, killing all on board.

In the 1960s Partridge appeared in a numerous television series and films, including the 1968 Plato's Stepchildren episode of Star Trek as Dionyd.

In the 1970s Partridge relocated to Rhodesia and appeared on a number of programs broadcast by the Rhodesian Broadcasting Corporation (RBC), including the shows Frankly Partridge and The Kwhizz Kids. He also was employed as a news anchor for RBC. During his time in Rhodesia Partridge also wrote extensively, including publishing the books Thought-Provoking Thoughts About Living and Rhodesia - As It Really Is , which was later republished under altered titles, and a weekly column in Rhodesia's TV Guide.

In the 1980s Partridge appeared in a number of films and television episodes, including a leading role in the 1981 film Savage Harvest.

Sixty five years after the downing of flight BOAC Flight 777 Partridge served as the narrator for “Leslie Howard: A Quite Remarkable Life”, a documentary about the ill-fated flight.

Partridge is also an avid sportsman and has competed in trap shooting competitions and written extension articles on the subject.

Film

• King & Country (1964)
• McGuire, Go Home! (1964)
• Where the Spies Are (1965)
• Thunderball (1965)
• The Murder Game (1965)
• The Killing of Sister George (1968)
• The Ivory Ape (1980)
• Savage Harvest (1981)
• My Tutor (1983)
• A Quite Remarkable Life (release date not announced)

Television

• Studio 4 (1962)
• Dixon of Dock Green (1962)
• The Two-Seater Bachelor Days (1963)
• ITV Television Playhouse (1963)
• A Matter of Espionage (1963)
• More Faces of Jim (1963)
• First Night (1963)
• Medal for a Turned Coat (1963)
• Espionage (1963)
• The Edgar Wallace Mystery Theatre (1963-64)
• The Verdict (1964)
• Diary of a Young Man (1964)
• Night Train to Surbiton (1965)
• Star Trek , Plato's Stepchildren episode (1968)
• Frankly Partridge — host of show (1970s)
• The Kwhizz Kids — host of show (1970s)
• Remington Steele (1983)
• R.S.V.P. (1984)
• T.J. Hooker (1985)
• Dallas (1986)
• Hunter (1987)
• Divorce Court (1987)
• Pagent vs Pagent (1987)
• Murder, She Wrote (1989)
• How to Find the Perfect Person for You (2002)
• The Indie Pendant (2005)