Joseph Losey had wanted Peter O'Toole to play the detective, but the producers were looking for a better known actor, and so they went with Stanley Baker. Obviously, since this would begin a four picture collaboration with Losey and Baker, the square-jawed Welsh actor had ultimately impressed the director in the role.
A promotional song for the US release,"Chance Meeting" with music by William Katz and lyrics by Ruth Roberts was published in 1960, but not used in the film.
The first of the several Joseph Losey films for which Richard Rodney Bennett provided the music.
Despite the title, the film does not involve any date that is - in any sense - blind.
Most of the aircraft at Heathrow are Vickers Viscounts, in British European Airways colours.