For the first time ever, all three (well, technically four, but I'll come to that later) stories of Doctor Who are presened on DVD in this box set. This gives you thirteen complete episodes of the show, and there's not a duffer among them.
The first DVD, "An Unearthly Child", gives us the first four episodes of the show beginning with the introduction of Susan Foreman (Carol Ann Ford), the Doctor (William Hartnell) and their new companions Ian Chesterton (William Russell) and Barbara Wright (Jaqueline Hill). Starting off in a less-than exciting first episode set in London, it's still an atmopheric and interesting piece of work. The last 3 episodes of set among cavemen, and is one of the best stories the show has ever offered.
But it is beaten by the second DVD - "The Daleks". This introduces the Doctor's most deadly enemies in a 7-part story which is exciting and terrifying at the same time.
The final two episodes are on the third DVD - "The Edge of Destruction". While not as good as the previous two stories, this is still an atmospheric and tense story, featuring just the main four characters trapped together inside the TARDIS, and despite their angst between one another reaching its peak by episode 2, they finally become friends, laughing together in the end before stepping out of the ship into a dark and snowy mountainside...
The fourth story, "Marco Polo", was originally a 7-part historical adventure but has sadly been lost. Here, however, it is condensed to one 25-minute episode, using the surviving soundtrack and colour telesnaps. The other extras are awesome too, especially the documentary about the birth of the greatest (or in my opinion, the ONLY entertaining) science fiction show ever to have been made...