EastEnders has a five-night run
EastEnders is going out five nights a week for one week only as it welcomes a new face - played by Jamie Foreman - to the square.
Foreman will play Derek Branning and viewers will see him arrive in Walford as his younger brother Max returns to the show.
Max, played by Jake Wood, left the square in August after his affair with his ex-wife was exposed.
Foreman, who specialises in screen hardman roles, is the son of a genuine East End villain.
His father, Freddie Foreman, was a former associate of the notorious Kray brothers in the 1960s. He was jailed for a decade for disposing of the body of Kray victim Jack "The Hat" McVitie.
Foreman, who has dated Patsy Kensit, has starred in Roman Polanski's Oliver Twist as well as Nil By Mouth and Gangster No 1.
He also appeared in ITV gangland drama Family, alongside former EastEnder actor Martin Kemp, who played Steve Owen for many years.
The five episodes of the BBC One soap will be shown in the week beginning November 21.
The programme usually goes out four nights a week but there will be only three episodes in the previous week when the BBC clears its schedule on November 18 for this year's Children In Need.