This article is not part of the Holby universe. This article covers a subject that is part of the real world, and thus should not be taken as a part of the Holby universe. Peter O'Brien (born 25 March 1960) is an Australian actor. He portrayed Theo "Stitch" Lambert on Casualty in 2007. Retrieved from "https://holby.fandom.com/wiki/Peter_O%27Brien?oldid=102959" Categories: Real world articles Actors/Actresses Series 21 cast Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.