When an elderly woman disappears in the middle of a transcontinental train ride and the young lady who shared her compartment cannot find anyone who even remembers the missing person, a complex and dangerous search for the truth begins. Superlative Hitchcock whodunit stars Margaret Lockwood, Michael Redgrave, Paul Lukas, and May Whitty. 96 min. Standard; Soundtrack: English PCM mono; audio commentary; featurette; interview; photo gallery; more. Also includes the bonus feature "Crook's Tour" (1941).