One victim, found dead on a London street. Four detectives, in four different time periods, must solve the mystery to protect Britain's future.
Strike
Life on Mars
Gangs of London
Sherlock
The Irregulars
Black Doves
Miss Scarlet
Ripper Street
Slow Horses
The Agency
Cross
Luther
Above Suspicion
Carnival Row
Emergence
The Capture
Continuum
The Changeling
Citadel
Ashes to Ashes