|Anthony Bate as Bret Rensselaer
He is also perhaps more familiar to most fans of spy fiction from his portrayal of civil servant Oliver Lacon in the BBC adaptation of Le Carré's Tinker, Tailor, Soldier, Spy and then the sequel, Smiley's People. However, as an established actor he has a tremendous CV of threatre and film appearances, including in Treasure Island, Crime and Punishment and Les Miserables.
Sadly, it looks like we're not able still to see Anthony's portrayal of Bret due to Len's continued decision not to permit further re-runs of the show or a DVD release. Len had reasonable doubts about some of the casting in the show, which explains his decision, but I do think Anthony Bate got Bret's mid-Atlantic drawl and position as the eminence grise of London Central just right.