After leaving defeating the Daleks and leaving his grand-daughter behind him it is understandable that the Doctor seeks out rest, but the TARDIS has other plans. They land in the future on an alien planet and a fairly ordinary two-parter ensues. I think it is true to say that this is more of an introductory episode for Vicki then anything else.

There is some thoughtfulness in the script. Barbara is scared for her life and kills an innocent sand monster, not understanding it had good intentions, as soon as Vicki reveals to her that it was an innocent creature she immediately feels guilty - so it has some stakes. I am glad that over the 11 stories not all the aliens have been evil, showing there is plenty of good in the universe. I am disappointed though that The Doctor played down the tragedy of this creature's death in order to win Vicki round to liking Barbara. It would have been interesting to see Vicki learn to forgive Barbara on her own merits.

There are nice moments, Barbara and Ian have plenty in common with Vicki as a companion - they are both from Earth and trapped outside of time. My main worry with Vicki is that she will take Susan's role directly in the TARDIS and have little to do that we have not already seen.