Calculated Risk

This film was shot during the notorious "Big Freeze of 1963" which began in December 1962, with snow falling or remaining on the ground until March 1963; temperatures were the coldest on record since 1683 and rivers and lakes froze over. Travel by road or rail was made very difficult and many rural places were cut off at times. Deep snow is seen in all the exterior shots of the film and it features in the storyline.