"It's a full-time job being around you two." – Dan Peterson - about Barnaby and Troy Dan Peterson is a pathologist at the Causton CID. He is played by Toby Jones and occasionally covers for Bullard when he is away. His first appearance was in Strangler's Wood. Appearances Judgement Day Death of a Stranger Dead Man's Eleven Strangler's Wood Retrieved from "https://midsomermurders.fandom.com/wiki/Dan_Peterson?oldid=7115" Categories: Pathologists Supporting character Community content is available under CC-BY-SA unless otherwise noted.