this be my favorite episode of star trek simply because it a side story with spock and scotty on the enterprise and kirk and mccoy and sulu . very good chemistry between spock and scotty ( specifically the scene in the jeffries tube ) . i think i have see this episode over 100 time and it never get old to me . the last second save of the enterprise be a tension fill scene . ( even though you know it will all work out ) . and the somewhat corny dialog such a i be for you sulu when the program come to take her next victim . even though it be somewhat cheesy it not cheesy enough to bring down the episode . over all it be a must see for any star trek fan and if you haven not see or hear of star trek check your pulse because you have be dead for 40 year .