This is a great audio story, and a great classic story of the First Doctor, travelling with Ian, Barbara and Vicki. Quite by chance, they discover that the Daleks are in possession of their own time machine and are intending to track them down and kill them all - an assassination squad is on its way through time and space, wherever they go! Can the Doctor and his friends hold their lead over the Daleks? What will they do when the time comes for a final showdown?
Also integral to this story is the relationship between all the companions, and there is a substory once they all land on the planet Mechanus, where they find more than they could ever have imagined, and meet someone else who becomes an integral part of Doctor Who.
This story is brilliantly read by Maureen O'Brien, who played the part of Vicki all those years ago, and she reads well all the many character's parts (apart from the Daleks who are played, brilliantly as always, by Nicholas Briggs), and narrates the overarching story really well. The sound effects are minimal but absolutely right when they occur. The whole thing draws you into the story which covers so much of time and space; over the whole of the 5 and a half hour duration of the story you feel like you are right there, with the Tardis and its inhabitants as they fight against what seems like an inevitable end at the hands (suckers?) of the Daleks.
Highly totally recommended for any fan of a great story, and particularly any fan of classic Doctor Who stories.