Millard Mitchell was the first actor to win a Golden Globe Best Supporting Actor award without receiving a corresponding Academy Award nomination. The other 6 in chronological order are: Earl Holliman in The Rainmaker (1956), Stephen Boyd in Ben-Hur (1959), Oskar Werner in The Spy Who Came in from the Cold (1965), Richard Attenborough in The Sand Pebbles (1966) then Doctor Dolittle (1967) (these two wins in successive years), Richard Benjamin in The Sunshine Boys (1975) and Aaron Taylor-Johnson in Nocturnal Animals (2016).
The phrase "highly inflammable", printed on the packing crate carrying the smuggled item, is the terminology used at the time, which would eventually be replaced in western society by "highly flammable".
As of 2017, the film has not seen a home video release.
The names of the psychologist and the warden are never mentioned, the psychologist even referring to himself, as others do, as "Doc" or "the bugs doc".