have watch all of the star trek tv series episodes many time each since the 1960s and most be quite good to superb and and only very few be mediocre and my opinion be that this one be the bad of all . in fact and i think it so poorly execute a to be an embarrassment to the series . it not that the story be so bad and although it not particularly outstanding in any way and but the acting be just abysmal on the part of the two lead character and mean those other than the regular in this case . barbara anderson give her weak performance ever a the daughter of a mass killer and and who be on a mission of a sort . she practically call in the role from a phone and and show no real emotive ability here . although usually she never use a more than a pretty face in most of her film or tv role and usually small part and she have do much well . arnold moss a her father give new meaning to the term ham and be the only actor ever on a 1960s star trek episode that outdo william shatner in this area and and actually make shatner look superb by comparison . and he get to play a shakespearian actor no less and which give him more impetus to overact and and he do so . other than these two lead be so weak and the story be such that anybody with any sense at all can tell who the killer be within the first 15 minute . i say this because i tell my brother the whole plot end at the first commercial break when we be watch the original 1966 broadcast a pre teen . his reply be and yeah and youre right . skip this one and watch the much superior menagerie episode which be originally televise right before .