Pretty dreadful tale of the Soviet occupation of Hungary in '56 made just 3 years later by Anatole Litvak. The problem is the 'love triangle' framework featuring a quite awful Deborah Kerr as an over privileged Brit trying to keep her Hungarian lover from out of the Russian clenches while putting the rest of her fellow travellers at risk. Robards in his screen debut falls flat failing to be convincing as Hungarian.
Straddling the fence between poignant and corny (often by balancing one foot firmly on the corny side), the plot, setting, and supporting characters are just window dressing for Yul Brynner & Deborah Kerr. Depending on how you look at it, there is something either very realistic or forced about how their romantic tension takes root silently, growing quietly before exploding in the late-plot crescendo of a kiss.