STORYLINE

An invasion of meteorites and an environmental crisis!

A scientific expedition has disappeared from the bed of the Thames Estuary, where a giant meteorite had landed years previously.

Having landed the TARDIS in the same vicinity, the Doctor and Sarah Jane are attacked at night by a vast, roaring creature.

Something reminds the Doctor of his encounter with the marine denizens of the planet Pesca, but before long his worst fears are confirmed: strange meteorites are landing all over the world, and the Pescaton invasion has begun.