Puzzle Aug 18, 1986

A bank robbery goes wrong. The robbers, two of them unemployed family men, take two hostages, one of them needing heart medication, and leave them in an apartment, tied to a bomb. The police has to find the apartment before the bomb explodes. At the same time, in the same house, two old men are solving a jigsaw puzzle, and a female cellist practices the Bach cello suites.