The Criminal Quartet (Russian: Криминальный квартет, romanized: Kriminalnyy kvartet) is a 1989 Soviet action film directed by Aleksandr Muratov.

The factory's management, in retaliation, orchestrates Anton’s abduction and demands Portnoy lift the warehouse’s security in exchange for his son’s safety.

Larin recalls hearing Beatles songs while he was held captive, leading the friends to deduce the location—a pool—where they discover the factory heads hiding.

During the standoff, one of the criminals reveals that Anton is held near the city’s water treatment plant, and gang members are already on their way to intercept the diverted train car.

Mukhanov instructs the guards at the rail yard to hold their ground without revealing their police identities, while the four friends engage in a brutal fight at the treatment plant.