Mycroft Holmes of Holmes stories: Mycroft Holmes Mycroft Holmes is a fictional character appearing in stories written by Sir Arthur Conan Doyle. He is the elder brother (by seven years) of detective Sherlock Holmes. He is described as having abilities of deduction and knowledge exceeding even those of his brother, though their practical use is limited by his poor physique and dislike of fieldwork. The character has been adapted in various pieces of literature and media, including television series, movies, radio, and comics. He is also popular in culture, being mentioned by many works, which mostly reference his job, personality, or his
Special Detective Unit Special Detective Unit The Special Detective Unit (SDU) () is the main domestic security agency of the "Garda Síochána", the national police force of the Republic of Ireland, under the aegis of the Crime & Security Branch (CSB). It is the primary counter-terrorism and counter-espionage investigative unit within the state. The Special Detective Unit superseded the Special Branch (which they are still commonly referred to as), which itself replaced the older Criminal Investigation Department (CID), which was founded in 1921. They work in conjunction with the Defence Forces Directorate of Military Intelligence (G2) – the Republic of Ireland's national intelligence