Doctor George Bullard (Barry Jackson) (series 1-14) is 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 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).