Joseph Losey had wanted Peter O'Toole to play the detective, but the producers were looking for a better-known actor, and they cast Stanley Baker. This would begin a four-picture collaboration between Losey and Baker, the square-jawed Welsh actor having ultimately impressed the director in the role.
Despite the title, the film does not involve any date that is - in any sense - blind.
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 three Joseph Losey films for which Richard Rodney Bennett provided the music.
Most of the aircraft at Heathrow are Vickers Viscounts, in British European Airways colours.