John Barrie is Sergeant Cork, one of the early members of London's Metropolitan Police C.I.D. – plain-clothes detectives tasked with maintaining law and order in the seething metropolis of Victorian London. Assisted by Bob Marriott (William Gaunt) from his attic office at Old Scotland Yard, Cork has to contend with the heavy crimewave created by the massive population boom, industrial expansion and an ever-widening gap between the rich and poor.

Devised by Dixon of Dock Green creator Ted Willis and produced by Jack Williams – best known for the classic series Within These Walls and New Scotland Yard – Sergeant Cork features inventive scripts from Willis, Man in a Suitcase contributor Richard Harris, Police Surgeon co-creator Richard Bond, and Timeslip contributor Bruce Stewart, among others. This complete set features all six series, comprising 66 episodes.