 Set in the 24th century , the series follows the adventures on Deep Space Nine , a space station located near a stable <unk> between the Alpha and <unk> <unk> of the Milky Way Galaxy . In this episode , Captain Benjamin Sisko ( Avery Brooks ) and the crew travel back in time to prevent the assassination of Captain James T. Kirk ( William <unk> ) of the USS Enterprise by a Klingon using a booby @-@ trapped tribble . 
