Actor, Screenwriter. He was a gaunt, and emaciated-looking actor who was best known for playing the character roles of churchwardens, doctors, youngsters, heroes, reporters, detectives, sergeants, code experts, privates, archbishops, district attorneys, Hebrews, guides, ticket clerks, cabbies, lynch mob members, bankers, miners, thieves, conductors, first mates, auctioneers, gamblers, directors, watchman, counselors, lieutenants, metermen, colonels, jurors, generals, old men, and grooms, usually in thriller films, horror films, adventure films, and Victorian mysteries. He will be best remembered for playing the role of 'Sgt Smollett' in the classic horror film, "The Pharoah's Curse" (1957). The film which was directed by Lee Sholem, which was produced by Howard W. Koch, Aubrey Schenck, and Edwin F. Zabel, which was written for the screen by Richard H. Landau, and which also starred Mark Dana, Ziva Rodann, Diane Brewster, George N. Neise, Ben Wright, Guy Prescott, Richard Peel, Kurt Katch, Robert Fortin, and Ralph Clanton, tells the story of a crazed Egyptian follows the members of an archaeology expedition and kills them off one by one while getting progressively older. He will also be best remembered for playing the role of 'Pat O'Reilly' in the episode entitled, "Mr. Henry Comstock," of the classic western television series, "Bonanza," which originally aired on November 7, 1959, and which also starred Lorne Greene, Michael Landon, Pernell Roberts, and Dan Blocker, tells the story of when threatened by a man who fraudulently sold a part of the Ponderosa by a Henry T.P. Comstock, the Cartwrights remember when they first met the silver-tongued claim-jumper and his scheme that laid the foundation of Virginia City. He was born one of three children as Terence Arthur De Marney in London, England, of Irish and French ancestry to Edward Arthur Toreau De Marney (1873-1942), and his wife Eileen Violet Concanen De Marney (1874-1959), in London, England, on March 1, 1908. He was also the grandson of the noted Victorian lithographer Alfred Concanen (1835-1886). He began his interest in entertainment by becoming an accomplished writer and producer for the stage by the age of nineteen. He made his theatrical debut in London, England, and had his first major appearance playing the role of 'Jim Hawkins' in the play, "Treasure Island." He also furthered his acting career on the stage by appearing in several stage productions of such plays as, "The Last Of Mrs. Cheyney," "Journey's End," as 'Gustave' in "The Lady Of The Camellias" (March 5, 1930, to April 19, 1930), as 'Tybalt' in 'Romeo & Juliet" (1934), as 'Philip Lombard' in "Ten Little Niggers" (November 17, 1943-), as the Director of, "Appointment With Death" (January 29, 1945, to May 5, 1945), as 'Lee Warren' in "Dear Murderer" (July 31, 1946, to October 12, 1946), as the Director of, "All Over The Town" (October 6, 1947, to January 31, 1948), as the Author of and as 'Kevin Ormond' in "The Crime Of Margaret Foley" (July 11, 1947, to January 17, 1948), as the Director of, "Madame Tic-Tac" (May 11, 1950, to June 3, 1950), "The Man Of Destiny" (1950-1951), as 'Slim Callaghan' in "Meet Mr. Callaghan" (February 25, 1952, to April 4, 1953), as the Director of and as 'Slim Callaghan' in "Dangerous Curves" (April 14, 1953, to June 11, 1953), and as 'Peador Flaherty' in "Gorillas Drink Milk" (February 18, 1964, to March 14, 1964). During his stage career, he also worked with, or appeared at, the Open air Theatre in London, England, the Garrick Theatre in London, England, the Golders Green Hippodrome in Golders Green, England, the Theatre Royal in Bath, England, the Winter Garden Theatre in London, England, the Comedy Theatre in London, England, (now Harold Pinter Theatre in London, England), the Playhouse Theatre in London, England, the New Theatre in Hull, England, the Aldwych Theatre in London, England, the King's Theatre in Southsea, England, the Prince of Wales Theatre in Cardiff, Wales, the St James Theatre in London, England, the Connaught Theatre in Worthing, England, the Piccadilly Theatre in London, England, the King's Theatre in Glasgow, Scotland, Palisades Productions Ltd, B A Meyer in association with Concanen, Concanen Stage Plays Ltd, Clifton Webb, Sidney Watts, Derrick Raoul Edouard Alfred De Marney, Anthony Hawtrey, Arthur Storch, Sir Robert Atkins, Percy Robinson, and Joseph Fenston. He also appeared in William Shakespeare's play, "Romeo & Juliet," at the Open Air Theatre in Regents Park, London, England, with Griffith Jones, Margaretta Scott, Eric Dance, Henry Baynton, Leslie French, Hubert Gregg MBE, Sir Ben Greet, Sydney Bromley, Michael Martin-Harvey, Laura Smithson and Greer Garson in the cast, and he also appeared in "Talking to You," at the Duke of York's Theatre in London, England, with Harry Towb, Nigel Hawthorne, Andreas Markos, Johnny Sekka, Graham Payne, Thelma Holt, Derek Fuke, Alexis Kanner and Rex Garner in the cast. He also, in 1941 formed Concanen Productions with his brother the actor Derrick Raoul Edouard Alfred De Marney (1906-1978), initially for the purpose of making wartime documentaries on the Polish Air Force including, "The White Eagle" (1942), and "Diary Of A Polish Airman" (1942), as well as actor, film director, film producer, and screenwriter Leslie Howard's film, "The Gentle Sex" (1943). He also co-founded with his brother the actor Derrick Raoul Edouard Alfred De Marney (1906-1978), the Independent Theatre Club (formerly the Kingsway Theatre), in London, England, which was an outlet for works banned for various reasons by the Lord Chamberlain. During this time, he also made the transition to appearing in films in both his native England in Hollywood, California. He made his actual film debut playing the role of 'Michael Winthrop' in the film drama, "The Eternal Feminine" (1931). The film which was directed by Arthur Varney, which was written for the screen by Hugh Broadbridge, Arthur Varney (who also produced and starred as 'Al Peters'), and Brock Williams, and which also starred Guy Newall, Doria March, Jill Esmond, Madge Snell, and Garry Marsh, tells the story of the love of a young actress for her crippled husband which triumphs. Besides, playing the role of 'Michael Winthrop' in the film drama, "The Eternal Feminine" (1931), and playing the role of 'Sgt Smollett' in the classic horror film, "The Pharoah's Curse" (1957), his many other film credits include, "Heroes Of The Mine" (1932), "The Men Of Sherwood" (1932), "Eyes Of Fate" (1933), "Little Napoleon" (1933), "The Unholy Quest" (1934), "The Immortal Gentleman" (1935), "Phantom Ship" (1935), "Born That Way" (1936), "Thunder In The City" (1937), "The House Of Silence" (1937), "The Case Of The Frightened Lady" (1938), "Who Is Guilty?" (1939), "They Met In The Dark" (1943), "Dual Alibi" (1947), "Uneasy Terms" (1948), "No Way Back" (1949), "Meet Mr. Callaghan" (1952), "The Silver Chalice" (1954), "The Joyful Tydings" (1954), "Mad At The World" (1955), "The Virgin Queen" (1955), "Target Zero" (1955), "Desert Sands" (1955), "23 Paces To Baker Street" (1956), "The Ten Commandments" (1956), "My Gun Is Quick" (1957), "The Wreck Of The Mary Deare" (1959), "Spartacus" (1960), "Midnight Lace" (1960), "The Secret Of The Purple Reef" (1960), "On The Double" (1961), "The Hatchet Man" (1962), "Confessions Of An Opium Eater" (1962), "Die, Monster, Die!" (1965), "Love Is A Woman" (1966), "Son Of The Sahara" (1966), "Separation" (1968), "The Strange Affair" (1968), and "Beast Of Morocco" (1968). Besides, playing the role of 'Pat O'Reilly' in the episode entitled, "Mr. Henry Comstock," of the classic western television series, "Bonanza," which originally aired on November 7, 1959, his many other television credits include, "The 20th Century-Fox Hour," "Telephone Time," "You Are There," "Lux Video Theatre," "The Joseph Cotten Show: On Trial," "Tales Of The 77th Bengal Lancers," "Matinee Theatre," "The Adventures Of Rin Tin Tin," "Date With The Angels," "Shiley Temple's Storybook," "Rescue 8," "The Veil," "Goodyear Theatre," "The Ann Sothern Show," "The Life And Legend Of Wyatt Earp," "Cimarron City," "The Thin Man," "Bourbon Street Beat," "Johnny Ringo," "Troubleshooters," "Peter Gunn," "R.C.M.P." "Tightrope," "Have Gun - Will Travel," "Wagin Train," "The Case Of The Dangerous Robin," "Hong Kong," "Sugarfoot," "The Islanders," "The Detectives," "Adventures In Paradise," "Angel," "The Lawless Years," "Whispering Smith," "Thriller," "Shannon," "Hawaiian Eye," "Maverick," "Surfside 6," "The Twilight Zone," "Death Valley Days," "The Beachcomber," "The Old Curiosity Shop," "Suspense," "Lorna Doone," "Comedy Playhouse," "Maigret," "Compact," "Dr. Finlay's Casebook," "The Third Man," "Boyd Q.C." "Cluff," "Jury Room," "The Spies," "Thirty-Minute Theatre," "Thirteen Against Fate," "Doctor WHo," "The Wednesday Play," "Boy Meets Girl," "Trapped," "Sexton Blake," "The Ugliest Girl In Town," "Softly Softly," "Z Cars," "BBC Play Of The Month," "ITV Saturday Night Theatre," "Softky Softly: Task Force," and "Follyfoot." His last film credit was playing the role of 'Gunge' in the comedy film drama, "All Neat In Black Stockings" (1969). The film which was directed by Christopher Morahan, which was written for the screen by Jane Gaskell and Hugh Whitemore, and which also starred Victor Henry, Susan George, Jack Shepherd, Clare Kelly, Anna Cropper, and Harry Towb, tells the story of an irresponsible window cleaner who believes he has found true love with a woman he picked up in a tavern. During his acting career, he also used the name of Terrence De Marney. Besides acting, he also wrote plays, and screenplays, and was an advisor on Shakespeare for television, the stage, and films. On an interesting note, he was the first actor to play the role of 'Simon Templar' aka "The Saint," on the radio. The same role was made famous by future James Bond star actor Sir Roger Moore (1927-2017), on the television series of the same name, "The Saint" (1962-1969), and actor Val Kilmer in the adventure film of the same name, "The Saint" (1997). He continued to write and act until his death. He passed away after accidentally falling under a tube train at the High Street Kensington Underground Station in London, England, on May 25, 1971, at the age of 63, and he was buried in the Family Plot in West Norwood Cemetery and Crematorium in West Norwood, England. He was married twice, first to Diana Hope Dunbar De Marney in 1937 but the couple later divorced, and second to the actress Beryl Measor (1908-1965), from 1945 until her death on February 8, 1965. He had no children. His brother the actor Derrick Raoul Edouard Alfred De Marney passed away peacefully from complications of bronchopneumonia and asthma at the Frimley Park Hospital in Frimley, England, on February 18, 1978, at the age of 72, and he is also buried in the Family Plot in West Norwood Cemetery and Crematorium in West Norwood, England.