Doctor Who #069 the Visitation

Promising Tegan to (finally!) get her back to Heathrow in time for the flight she is meant to be working on, the Doctor yet again proves incapable of steering the TARDIS correctly and arrives in the right place but a few hundred years to early. However, the TARDIS crew are not the only unusual visitors to Earth at this time: a spaceship has crashed there, and its occupants have plans which threaten Earth's future...One of Doctor Who's strengths is portraying strange events in an historical setting. 'The Visitation' is a fine addition to this tradition, with a lively storyline, an interesting new alien race, and a degree of individuality shown by the companions - with three (Adric, Nyssa and Tegan), it sometimes transpires that they seem interchangeable. And then there's Richard Mace, a fine supporting character who adds some local colour (if you can use that term in a temporal sense) to the proceedings.All-in-all, a well thought-out and produced story, appropriately novelised by it original author.