poor donald pleasence . he be in a lot of really awful film and and this be one of the bad . he be know for put in good performance even when hand a bad script and but in this disaster and he doesn not even try . in addition to the apathy of the cast and the scriptwriter obviously do not care too much since this film make absolutely no sense whatsoever . there be fissure burst open at random and men run around in creature from the black lagoon costume and a gratuitous song and a mysterious dagger and lot of tunnel and but no logic .