A brilliant opener for Season 18. This one harbours so much ambition, and Argolis as a society feels like a world that's lived in, with so much depth. The special effects are among the strongest in the classic series, particularly the Fourth Doctor's old man make-up, and the Doctor and Romana's dynamic continues to be great.

However, the story does spend a little too long at Brighton beach, and the Foamasi are somewhat underused. It's a shame because they are an interesting species.