Anachronisms: References to a "new 1958 model car" place the film in 1957 or 1958. The radio plays Bobby Darin's "Mack the Knife," which was released in 1959.
Anachronisms: A theatre marquee advertises La dolce vita (1960).
Continuity: The address written on Goodwin's legal pad does not match the street address when they visit.
Anachronisms: When Goodwin is talking to the Geritol rep, you can see oversize volumes of the "Dictionary Catalog of the Research Libraries of the New York Public Library, 1911-1971", which was published in 1979.
Anachronisms: The Thistle Class One sailboat is rigged with specialty Harken blocks (pulleys), which were introduced in the 1990s.
Anachronisms: During the "Today Show" interview, flags are visible as the camera pans to the shot of the crowd. The present-day South African flag is clearly visible.
Errors made by characters (possibly deliberate errors by the filmmakers): During the lunch scene, Goodwin describes the Reuben Sandwich as the only entirely invented sandwich entered in a sandwich contest by Reuben Kay. Some claim that a wholesale grocer named Reuben Kulakofsky created the sandwich at Omaha's Blackstone Hotel in 1925. However, Fern Snider, a waitress at the Blackstone, entered the recipe in a national sandwich competition in 1956, and won.
Anachronisms: The call letters on the TV cameras are WNBT. New York's NBC affiliate changed its call letters from WNBT to WRCA in 1954, 3 years before the Van Doren streak.
Anachronisms: At the beginning, Goodwin overhears news about Sputnik's launch. Van Doren appeared on "21" from November 1956 to March 1957. The Soviets launched Sputnik in October 1957.