Red Cap is a British television drama series, produced by Stormy Pictures for the BBC and broadcast on BBC One. A total of thirteen episodes were broadcast over the course of two series, beginning with a feature-length pilot on 28 December 2001. The series follows the investigations and personal relationships of a British Army Special Investigation Branch unit of the Royal Military Police based in Germany. The series initially focused on lead character, Sergeant Jo McDonagh (Tamzin Outhwaite), who was nicknamed McDoughnut, but later series played out as more of an ensemble piece, with several notable characters coming to prominence. A number of fictional regiments were featured in the series, including the Bedford Light Infantry, the Royal Cumbrian Fusiliers, the Wessex Regiment and the Derbyshire Light Infantry.