The non-corporeal justice machines in parts 3 and 4 of The Stones of Blood keep the Douglas Adams feel going into this story. I’d love to know the extent of Adams’ input as script editor. Their inclusion goes some way to tying up a disparate and muddled storyline. The setting of the spacecraft and the contemporary stone circle all works rather well - but the plot falls to pieces.

The other issue is that the older woman central to this story was miscast. For a character given such confident, knowledgeable lines she’s fluffs her delivery more than William Hartnell. When she’s not tripping over her words or adding unnatural pauses she’s desperate to get her lines out or just waiting for the other actors to finish.

I’m still enjoying this series though. Despite its flaws, this was another entertaining addition to the ongoing arc.