Ray Sage was a Metropolitan Police Officer serving at Sun Hill in 1990.
Prior to his assignment at Sun Hill, Sage was a Detective Sergeant assigned to Area and in August 1989 was taking part in an observation with D.S. Picton of local Sun Hill criminal Paul Burnell. They were relieved by D.S. Alistair Greig and D.C. Tosh Lines to the dissatisfaction of the Area officers who saw it as their operation rather than a divisional one. (Time Out)
By January 1990, Sage had transferred to Sun Hill as a uniformed Sergeant and was on duty for P.C. Taffy Edwards' last day, twice commenting to his junior officer that he had thought he had already left. (I Thought You'd Gone)
In June 1990, Sage is on the night shift and bemoans to D.I. Frank Burnside the skeleton staff he has been left with as they have been assigned to a CID operation. (Tactics)
In September 1990, Sage is on duty in Custody and processes the associates of the criminal Rossetti prior to his arrival at the station. (When Did You Last See Your Father)
In October 1990, Sage is covering Sgt. Bob Cryer on A Relief and approaches D.I. Burnside regarding the welfare of the prisoner Dave Rawlings. Later that day, Sage receives Burnside's wrath after Rawlings escapes from a hospital whilst under police guard. (Family Ties)
Notes:
Ray Sage was played by London's Burning star Ben Onwukwe in all five appearances. In each appearance he receives a different named credit - D.S. Sage, Sergeant, Night Shift Sergeant, Sgt. Sage and Sgt. Ray Sage. His name is never mentioned in dialogue.
Sage's epaulette number was SO68 (as seen in his final appearance in 'Family Ties'). In his first uniformed appearance in 'I Thought You'd Gone', it is a three digit number beginning with a 3 (although the full number is not visible on screen).
Despite usually appearing with the A relief in his uniformed appearances, it is confirmed in dialogue in his last episode that he is not an A relief Sergeant and on this occasion is covering an absent Sgt. Cryer.
In The Bill 4, his surname is given as 'Utley'.