As DNA evidence from an old case of Spencer's (while he was working for the Atomic Energy Constabulary) is re-examined it appears that the wrong man was sent to jail. Someone tries to cover up the new evidence, causing all eyes to turn to Spencer.moreless
The team work frantically to link their suspect to his crimes. But he is becoming more brazen, killing his victims in public.
Someone possibly copying the past crimes begins harassing Grace about her testimony against Tony Greene. If she doesn't admit that she was wrong about him, the assailant promises to murder the victim he/she is holding hostage.moreless
The team discover the brutally murdered body of a man in the same cellar that the businessman was held hostage in. While investigating the two victims, the team find an unlikely suspect. They're positive of his connection to the murders, but need to collect the evidence to prove it.moreless
Boyd is suspended from work after being involved in a hit and run accident while possibly under the influence. While also trying to find out who framed Boyd, the team continue trying to find out if Vine is innocent or not.moreless
Spencer goes undercover as a prison inmate to investigate the possible reasons for the murders from the man convicted of committing the crimes. To Spence's dismay, the man (who is too scared to say anything about what happened) commits suicide before he can be coerced into revealing who the real killer is.moreless
A mummified body is discovered in a disused airliner that has been parked in the desert forsix years. There are indications of a link to an armed robbery at Heathrow Airport six years earlier, and a murder at around the same time. The team gains a new member—Dr Felix Gibson.moreless
Barnaby's new partner, Sergeant Dan Scott, arrives from London's Metropolitan Police and expects to have a quiet life. But then the murders begin. The first victim is Fiona Thompson, stabbed several times with a long knife on her way home from a flamenco night at Midsomer Mallow village hall - and a witness reports a mysterious squeaking noise at the scene of the crime...