On Thin Ice (1966 film)

On Thin Ice (По тонкому льду) is a 1966 Soviet spy film directed by Damir Vyatich-Berezhnykh, based on Georgiy Bryantsev's 1961 book, which provided the first authoritative public description of counterintelligence group GUKR (SMERSH).

Plot
Two NKVD agents fight foreign spies in the Oryol Oblast before and during the Second World War.

Release
On Thin Ice was released in the Soviet Union on 26 September 1966.

It was the highest-grossing film in the Soviet Union for 1966, with 42.5 million tickets sold.