Leo Genn in the context of "The Old Vic"

Gaius Petronius Arbiter (/pɪˈtroʊniəs/; Classical Latin: [ˈɡaː.i.ʊs pɛˈt̪roː.ni.ʊˈs ar.bɪ.t̪ɛr]; c. 27 – c. 66 AD; sometimes Titus Petronius Niger) was a Roman courtier during the reign of Nero (r. 54–68). He is generally believed to be the author of the Satyricon, a satirical novel believed to have been written during the Neronian era. He is one of the most important characters in Henryk Sienkiewicz' historical novel Quo Vadis (1895). Leo Genn portrays him in the 1951 film of the same name.

Quo Vadis (Latin for "Where are you going?") is a 1951 American religious epic historical film set in ancient Rome during the final years of Emperor Nero's reign, based on the 1896 novel of the same title by Polish Nobel Laureate author Henryk Sienkiewicz. Produced by Metro-Goldwyn-Mayer and filmed in Technicolor, it was directed by Mervyn LeRoy from a screenplay by S. N. Behrman, Sonya Levien, and John Lee Mahin. It is the fourth screen adaptation of Sienkiewicz's novel. The film stars Robert Taylor, Deborah Kerr, Leo Genn, and Peter Ustinov, and features Patricia Laffan, Finlay Currie, Abraham Sofaer, Marina Berti, Buddy Baer, and Felix Aylmer. Future Italian stars Sophia Loren and Bud Spencer appeared as uncredited extras. The score is by Miklós Rózsa and the cinematography by Robert Surtees and William V. Skall. The film was released by Metro-Goldwyn-Mayer on November 2, 1951.

The story, set between 64 and 68 AD, combines both historical and fictional events and characters, and compresses the key events of that period into the space of only a few weeks. Its main theme is the Roman Empire’s conflict with Christianity and persecution of Christians in the final years of the Julio-Claudian line. Unlike his illustrious and powerful predecessor, Emperor Claudius, Nero proved corrupt and destructive, and his actions eventually threatened to destroy Rome's previously peaceful social order. The title refers to an incident in the apocryphal Acts of Peter.

Moby Dick is a 1956 adventure film directed and produced by John Huston, adapted by Huston and Ray Bradbury from Herman Melville's 1851 novel Moby-Dick. It stars Gregory Peck as Captain Ahab, Richard Basehart as Ishmael, and Leo Genn as Starbuck, with supporting performances by James Robertson Justice, Harry Andrews, Bernard Miles, Noel Purcell and Orson Welles as Father Mapple.

A co-production of the United Kingdom and the United States, the film was distributed by Warner Bros. on June 27, 1956. It received positive reviews from critics and audiences and was a commercial success. The National Board of Review ranked the film in its Top 10 Films at their 1956 awards, with Huston winning Best Director and Baseheart winning for Best Supporting Actor. Huston was nominated for a Directors Guild of America Award for Outstanding Directing – Feature Film at the 9th Directors Guild of America Awards.

The Longest Day is a 1962 American epic war film based on Cornelius Ryan's 1959 non-fiction book of the same name about the D-Day landings in Normandy on June 6, 1944. The film was produced by Darryl F. Zanuck for 20th Century-Fox, and is directed by Ken Annakin (British and French exteriors), Andrew Marton (American exteriors), and Bernhard Wicki (German scenes). The screenplay was written by Ryan, with additional material written by Romain Gary, James Jones, David Pursall and Jack Seddon.

The film features a large international ensemble cast that includes John Wayne, Kenneth More, Richard Todd, Robert Mitchum, Richard Burton, Steve Forrest, Sean Connery, Henry Fonda, Red Buttons, Peter Lawford, Eddie Albert, Jeffrey Hunter, Stuart Whitman, Tom Tryon, Rod Steiger, Leo Genn, Gert Fröbe, Irina Demick, Bourvil, Curd Jürgens, George Segal, Robert Wagner, Paul Anka and Arletty. Many of these actors played roles that were essentially cameo appearances. Several cast members had seen action as servicemen during the war, including Albert, Fonda, Genn, More, Steiger and Todd, the latter having been among the first British officers to land in Normandy in Operation Overlord and participate in the assault on Pegasus Bridge.