The producers also planned to wrap up long-standing mysteries , such as the nature of the smoke monster , the reason the Dharma periodic resupply drops continue after the purge , and the `` bird '' from `` Exodus Pt . The producers planned to wrap up mysteries , such as the reason the Dharma periodic resupply drops continue after the purge , Walt 's unusual abilities , and the `` bird '' from `` Exodus Pt .