This is one excellent episode. Some of the special effects were pretty ammazing, and i wonder how it was done. the storyline is decent to say the least, and the solution in the end towards thrwarting the evil that they face is one higher then we imagine. I do not know why Tasha Yar got cancelled, however, i did like the twist, because in the lives they lead, sometimes the good guys just get it, and not always those in a red shirt. I like that part because i did not see this coming, and that overwhelming part got me intrigued for many more seasons.