<P> Detective Sergeant (later Inspector) Gavin Troy (Daniel Casey) (main: series 1 - 7; guest: series 11)--DCI Barnaby's first assistant . Troy is bright and ambitious . Early in the series, Troy is also known for his careless driving, causing a number of near - accidents (which does not stop at all, even in his final / guest appearance). Troy is also prejudiced towards gay people (in the very first episode, "The Killings at Badger's Drift", he shows his discomfort by using a slur against the gay undertaker & in the episode "Blue Herrings", he uses a slur against a character who he perceives as being gay) and the elderly, referring to them as "wrinklies". In "Market For Murder" and "Destroying Angel" Troy provides valuable insight, finding out how the killers committed the murders, so oddly it was not Barnaby who solved those cases . In "Painted In Blood", Barnaby is forbidden to take part in the investigation, but Troy supplies him with information . Later on, Barnaby is taken hostage in a bank robbery and might have died until Troy sneaked in and attacked the robber, yet at the same Troy would himself have been killed had Barnaby not stepped in, but together they overpower the robber . Troy's relationship with Barnaby is warm, and the two make a formidable pair . Troy was promoted to Inspector and transferred in the first episode of the seventh series, called "The Green Man". Troy makes one re-appearance in the first episode of Series 11, "Blood Wedding", to attend the wedding of Tom's daughter, Cully Barnaby (whom he once secretly kissed, which temporarily strained his relationship with Barnaby), where he met his second successor, Sgt Jones . </P> <P> Doctor George Bullard (Barry Jackson) (series 1 - 14)--Causton's resident pathologist . Bullard goes about his work with a professional skill and a cheery personality . He is a good friend of Tom Barnaby's and has been a regular throughout the series (save for a brief spell, when his place was taken by Dr. Dan Peterson played by Toby Jones). In later episodes, Bullard has often played a greater role in the plot, even making a sterling appearance in the Midsomer Worthy Choir in "Death in Chorus". In one episode, he admits to the "accidental" death of his first wife while on tour at a slaughter house . At the end of "The Oblong Murders", Bullard tells Barnaby that he's going to take some time off: "I've decided to do some fishing . Like Tom . He suggested a holiday in Ireland .", which is most likely his retirement (like Tom). </P> <P> Joyce Barnaby (Jane Wymark) (series 1 - 13)--DCI Tom Barnaby's long - suffering wife . She is tolerant of her husband, despite his being a workaholic who spent their honeymoon solving the case of the "Pimlico Poisoner", which suggests that they met in London . Joyce is an easy - going and friendly woman who likes to be involved in community activities . She has long possessed a desire to move out of their Causton home and into one of the picturesque Midsomer villages--only to be put off by the grisly murders that occur there . She's known to her family as an experimental, but not always successful, cook . Thus, Tom is often seen taking advantage of every opportunity to dine out . She married Tom in 1973 and their only child, Cully, was born five years later in 1978 . Her parents are called Muriel and Douglas . </P> <P> Detective Sergeant Daniel "Dan" Scott (John Hopkins) (series 7 - 8)--is a lot cockier than his predecessor DS Troy; he is a Londoner who was not thrilled at being transferred from the Metropolitan Police Service to Midsomer, which he regards as the "sticks". His relationship with Tom was prickly at first; but it mellowed into a slightly awkward marriage of convenience, with Barnaby still disapproving of Scott's methods and Scott grudgingly starting to respect Barnaby . In "The Straw Woman", Scott develops a love interest who is brutally murdered . The episode is notable for Barnaby's lack of sympathy for Scott . Scott's departure from the show was abrupt . In "The House in the Woods", Barnaby describes Scott as having called him to say he was sick and thus unable to come to work . Barnaby invites Ben Jones to assist him on that case . After this incident, no more is heard from Scott, and Jones becomes the new deputy . </P>

Who plays barnaby's wife in midsomer murders