Seventeen Moments Of Spring - 1973 - 8/10
AKA - Семнадцать Mгновений Bесны

Engrossing espionage par excellence.
No explosions, limited gunplay, no car chases.
Nuts n bolts, nerve wracking intelligence gathering.
Max Otto von Stierlitz, a high operative in the SD, has actually been a Soviet plant since 1933.
Now 1945, the second world war is nearing an end and Moscow has given him an important mission.
Determine if someone in German high command is trying to make a separate peace with Western powers.
Find out who that individual is. Then thwart any separate peace plans.
Candidates include Göering, Goebbels, Bormann, Himmler.
Other Reich agencies, jockeying for power and spying on each other, include the SS, the Gestapo.
In short, Stierlitz maneuvers within a thicket of knives.
The pace is slow, but the intensity seldom flags as Stierlitz must protect sources, recruit allies, liquidate loose ends, and explain himself over and over to operational chiefs.
Based on the actual negotiations, Operation Sunrise Crossword, this series was a favorite of Leonid Brezhnev.