WHITECHAPEL (10 pm)
When a vast police archive is discovered at the station Chandler persuades a reluctant Miles that Buchan be taken on as a police researcher. That night Ben Salter and three friends are murdered in Ben's tailor' s shop with no suggestion of forced entry. Fear spreads through the area as folk suppose the killer to be supernatural though Buchan sees a connection to the Ratcliffe Highway killings of 200 years earlier. Chandler's main suspect is Dan Wilkie,a rival of Ben Salter as a teenager until Ben's embittered half-brother Marcus is pulled in and placed in custody, until he mysteriously disappears.