found: Screen directors playhouse. White corridors [MP] 1956:credits (cast, Pat Hitchcock)
found: IMDb Website, July 24, 2002:(Patricia Hitchcock; b. July 7, 1928, London, England; daughter of Alfred Hitchcock and Alma Reville; sometimes credited as: Pat Hitchcock, Pat Hitchcock O'Connell, Patricia Hitchcock O'Connell)
found: OCLC, July 24, 2002(hdgs.: Hitchcock, Pat; Hitchcock, Patricia, 1928- ; usage: Pat Hitchcock, Patricia Hitchcock)
found: Alma Hitchcock, 2003:CIP t.p. (Pat Hitchcock O'Connell)
found: Washington post WWW site, viewed August 12, 2021(in obituary dated "yesterday": Pat Hitchcock, the only child of director Alfred Hitchcock and an actor herself who made a memorable appearance in her fathers "Strangers on a Train" and championed his work in the decades following his death, died Aug. 9 at her home in Thousand Oaks, Calif. She was 93. Patricia Alma Hitchcock was born July 7, 1928, in London. She co-wrote a book on her mother, "Alma Hitchcock: The Woman Behind the Man." Pat Hitchcock was married for more than 40 years to Joseph O'Connell)