Question: Who did George Sanders play in Alfred Hitchcock's first American project?

Context paragraphs:
Journey to Italy: Journey to Italy, also known as Voyage to Italy, is a 1954 drama film directed by Roberto Rossellini.  Ingrid Bergman and George Sanders play Katherine and Alex Joyce, an English married couple whose trip to Italy unexpectedly undermines their marriage.  The film was written by Rossellini and Vitaliano Brancati, but is loosely based on the novel "Duo" by Colette.  Although the film was an Italian production, its dialogue was in English.  The first theatrical release was in Italy under the title Viaggio in Italia; the dialogue had been dubbed into Italian.

Patrick McGilligan (biographer): Patrick McGilligan (born 1951) is an Irish American biographer, film historian and writer.  His biography on Alfred Hitchcock, "Alfred Hitchcock: A Life in Darkness and Light" was a finalist for the Edgar Award.  He is the author of two "New York Times" Notable Books, and he lives in Milwaukee, Wisconsin.  He is also noted for his biography on Clint Eastwood, "Clint: The Life and Legend", which reveals much about Eastwood which his official biography by Richard Schickel left out.  In addition to Hitchcock and Eastwood, he has written biographies on Robert Altman, James Cagney, George Cukor, Fritz Lang, Oscar Micheaux, Jack Nicholson, and Nicholas Ray.  He is also an editor of "Backstory", which features interviews of Hollywood screenwriters and is published by the University of California Press.

Phantom Lady (film): Phantom Lady is a 1944 crime drama film noir directed by Robert Siodmak starring Franchot Tone, Ella Raines and Alan Curtis.  The film was Siodmak's first Hollywood noir.  It was also a first for producer Joan Harrison, Universal Pictures' first female executive, who was Alfred Hitchcock's former screenwriter and went on to produce his TV show "Alfred Hitchcock Presents".  The film was based on the novel of the same name written by Cornell Woolrich but published under the pseudonym "William Irish".

British contribution to the Manhattan Project: Britain contributed to the Manhattan Project by helping initiate the effort to build the first atomic bombs in the United States during World War II, and helped carry it through to completion in August 1945 by supplying crucial expertise.  Following the discovery of nuclear fission in uranium, scientists Rudolf Peierls and Otto Frisch at the University of Birmingham calculated, in March 1940, that the critical mass of a metallic sphere of pure uranium-235 was as little as 1 to , and would explode with the power of thousands of tons of dynamite.  The Frisch–Peierls memorandum prompted Britain to create an atomic bomb project, known as Tube Alloys.  Mark Oliphant, an Australian physicist working in Britain, was instrumental in making the results of the British MAUD Report known in the United States in 1941 by a visit in person.  Initially the British project was larger and more advanced, but after the United States entered the war, the American project soon outstripped and dwarfed its British counterpart.  The British government then decided to shelve its own nuclear ambitions, and participate in the American project.

Alfred Hitchcock Presents: Alfred Hitchcock Presents is an American television anthology series that was hosted and produced by Alfred Hitchcock; the program aired on CBS and NBC between 1955 and 1965.  It featured dramas, thrillers, and mysteries.  By the time it premiered on October 2, 1955, Hitchcock had been directing films for over three decades.  "Time" magazine named it one of "The 100 Best TV Shows of all time".  The Writers Guild of America ranked it #79 on their list of the 101 Best-Written TV Series tying it with "Monty Python's Flying Circus", "" and "Upstairs, Downstairs".

The George Sanders Mystery Theater: The George Sanders Mystery Theater is the title of a 30-minute American television mystery drama series hosted by character actor George Sanders which aired Sundays on NBC in the summer of 1957.

Alfred Hitchcock's Anthology – Volume 1: Alfred Hitchcock's Anthology – Volume 1 is the first installment of "Alfred Hitchcock's Anthology", one of the many Alfred Hitchcock story collection books; edited by Eleanor Sullivan.  Originally published in hardcover in 1976 as "Alfred Hitchcock's Tales to Keep You Spellbound", the book is a collection of 30 stories originally published in "Alfred Hitchcock's Mystery Magazine".

Rebecca (1940 film): Rebecca is a 1940 psychological drama film directed by Alfred Hitchcock.  It was Hitchcock's first American project, and his first film under contract with producer David O. Selznick.  The screenplay by Robert E. Sherwood and Joan Harrison and adaptation by Philip MacDonald and Michael Hogan were based on the 1938 novel of the same name by Daphne du Maurier.  The film stars Laurence Olivier as the brooding, aristocratic widower Maxim de Winter and Joan Fontaine as the young woman who becomes his second wife, with Judith Anderson and George Sanders in supporting roles.

George Sanders: George Henry Sanders (3 July 1906 – 25 April 1972) was a Russian-born English film and television actor, singer-songwriter, music composer, and author.  His career as an actor spanned more than 40 years.  His upper-class English accent and bass voice often led him to be cast as sophisticated but villainous characters.  He is perhaps best known as Jack Favell in "Rebecca" (1940), Scott Folliott in "Foreign Correspondent" (1940) (a rare heroic part), Addison DeWitt in "All About Eve" (1950), for which he won an Academy Award, King Richard the Lionheart in "King Richard and the Crusaders" (1954), Mr. Freeze in a two-parter episode of "Batman" (1966), the voice of the malevolent man-hating tiger Shere Khan in Disney's "The Jungle Book" (1967), and as Simon Templar, "The Saint", in five films made in the 1930s and 1940s.

Foreign Correspondent (film): Foreign Correspondent (a.k.a. Imposter and Personal History) is a 1940 American spy thriller film directed by Alfred Hitchcock.  It tells the story of an American reporter who tries to expose enemy spies in Britain who are involved in a fictional continent-wide conspiracy in the prelude to World War II.  It stars Joel McCrea and features 19-year old Laraine Day, Herbert Marshall, George Sanders, Albert Bassermann, and Robert Benchley, along with Edmund Gwenn.

Supporting paragraphs: George Sanders Rebecca (1940 film)
Answer: Jack Favell