Tenniel Evans

When Hacker recognises a visiting head of an African nation as someone he knew from his student days, he does his best to offload some British-made oil rigging gear on him.

A Norfolk squire consults Holmes about the stick figures drawn in chalk that have been terrorising his young American wife.

The Miniscope is damaged and beginning to fail, the Drashigs running loose. Can the Doctor return everyone to their proper time and place before it's too late?