Goofs

Towards the end, when Barnaby and Nelson are going after the killer down into the bunker, they are seen from behind going down the stairs. In this shot, Barnaby can be seen holding up a mobile phone as a light. Cut to the next scene, and it is a conventional flashlight in his hand.

The skeleton in the freezer has the form of a human body, but after 30 years buried in the soil, the joint and muscles would be dissolved and decomposed. Therefore the bones would have fallen apart when moved and not still kept together.

The character of Group Captain Ford is said to have been the commanding officer of the Cooper Hill RAF base since 1984 - in other words, at least 31 years. This is at odds with his wife's observation that the RAF shunt personnel around all the time, and what's more, it's patently ridiculous that a man in his late 50s could have been a Group Captain in his mid-20s.

The character of Felicity Ford is said to be in her early thirties, yet Nathan Tonev (who is said to have played with her as a child) was 10 years old in 1984.

At Barnaby's surprise party, he puts on a film on the film viewer but there is already a reel on the viewer when he does so.

In the opening scenes, after the girl stops her car it changes position several times from being a few degrees off course and blocking only the left-hand side of the road, to straddling the road and blocking it entirely.

DS Nelson describes Gp Capt Ford as a decorated officer. Ford has three campaign medals and two worthless jubilee medals, none of which may be described as decorations.

Although the catkins do seem to be genuine, the tree Kam shows to DS Nelson in the woods is no 'Populus nigra' (black poplar) at all, but a Castanea sativa (sweet chestnut).

When DCI Barnaby looks at the file on Eric Tonev to see that he was described as wearing red corduroy trousers when he disappeared, trousers is spelled 'trouses' in the file.