Croatian film critic Tomislav Čegir argued that the motif of internal disarray, apparent in
The Third Key, is also present in other Tadić's films, such as
Dreaming the Rose (1986) and
Osuđeni (1987). The protagonists "become insignificant individuals due to societal, economic, as well as political determinants, which entails their position of alienation, marginalization, or even apostasy". In Čegir's view, these themes also hinted at the actual reality of disarray which was corroding the Yugoslav society in the 1980s, eventually leading to the
breakup of the country.
Jurica Pavičić too saw Tadić's 1980s films as a "moral chronicle of an era", where the heroes are "people who have used their connections to get a [state-owned] apartment, who have given or taken a bribe, gotten ahead at other people's expense, in short – socialist citizenry which 'does what others do too', until a metaphysical punishment catches up with them". The powerlessness of the individual is deepened by their failure to connect to people around them. In
The Third Key, the absence of trust destabilizes the marriage and makes it vulnerable to outside influences. In other Tadić's films, the protagonists also tend to be divided by mistrust, opportunism, or inability to establish deeper personal relationships. Yet Tadić is partial to his characters, who tend to experience their seemingly inescapable predicament with stoic pessimism.
The Third Key and Tadić's other films also share the themes of the inevitability of fate, as well as the question of justice. The two protagonists attempt to find a new way of living in order to extract themselves from their background, but the metaphorical inevitability of fate prevents them from doing so, and by the time they realize they are unable to change it, it is already too late. ==Reception and legacy==