Not afraid to show its roots, this episode riffs on both Gremlins (the Grazlak react to heat as the Mogwai do to water) and Superman (the creatures’ abilities are different because of the properties of the sun), as well as Home Alone, and any sort of base under siege story. Although it’s very much a runaround, it’s shot well, and where one Grazlak wasn’t that threatening, a whole horde of them do become menacing.
The relationship between Tom and Benny is starting to ring a bit more true now, although since both of them stand out from the crowd, the danger is that they’ll become seen as a Geeks United. Annette Badland is clearly enjoying playing the grandmother who isn’t perhaps quite as dotty as she appears, and we get a potential love interest for Tom gently introduced.
But the majority of the episode is humans vs aliens, and after the great quantities of green goo that we’ve had in the Who shows (particularly for the Slitheen), it’s time for tomato soup to get thrown everywhere (or rather, in the direction of our heroes!)
Verdict: More fun than the opening part, this is an enjoyable runaround. 7/10