`The Mutants` is 1970s Doctor Who at its most allegorical, packed with themes such as colonisation, scientific morals, economic reality and racism, often delivered in dialogue heavy scenes. If that makes it sound dull, then you’ll be surprised just how involving it is, how the six part format allows plenty of time for running about and action to balance the more issue driven aspects. Writers Bob Baker and Dave Martin deserve credit for keeping such a bunch of characters interesting. When you look at the roll call –marshall, administrator, scientist, guards – you might be forgiven for thinking nothing will spark but it does. The plot remains inquisitive at all times, finding new angles and developments all the time even if by the end you feel a little bit Solosed out.