The main thing to remember about watching a first seaeson story of Doctor Who is: the age of the episodes. This particular show was made 56 years ago. Special effects were a new thing, and this show did not have a huge budget. However, this particular story is one of the strongest William Hartnell Doctor's to exisi. This is the 2nd major "space" story arc and it is an entertaining basic sci=fi romp. It was transmitted just after the first historical episode (the seven part MARCO POLO)., and prior to the first historical story that still exisits ( the AZTECS). The Keys Of Marinus combines all the elements that made the early Hartnells so charming. The gruffness of "Grandfather" . the shrill screaming of Susan. the "tres macho" Ian. a rubbery . but believeable monster in the Voord, .and Barbara who could be one of the shows best screamers. but decided not to do that in this story. Marinus is one of the first examples of the development of feminism in sci=fi. Barbara actively steps up and solves the kidnapping without involving the Doctor. Do I think that you should watch this show? YES. Here is what is going to happen. You will put the dvd in and in five minutes pull the dvd out cussing about how bad it is, or you will laugh hysterically for the better part of two hours. (and not because the show wants you to). or you will take into account the shows age and watch a prime example of early 1960"s sci=fi unfold before your senses. The first time I watched this episode I was left with a nagging feeling in the back of my brain, it was'nt until the second viewing that I started to apreciate the depths of characterisations that the actors were trying to achieve . the actors were really busting their tails to make this believable. So suspend the"Avatar" special effects for a couple hours. and travel back in time to1964. I think you're going to like it.