This year's festive Walford plot sees the demise of the Albert Square villain when one resident's temper boils over into a blind rage, resulting in Archie's (Larry Lamb) untimely death.
Characters rumoured to be in the frame for his murder will include his co-conspirator Janine Butcher (Charlie Brooks), his wife Peggy Mitchell (Barbara Windsor), nephew-come-stepson Phil Mitchell (Steve McFadden) and ladies' man Jack Branning (Scott Maslen).
The soap's first ever live screening will broadcast in real time from its set in Elstree, Hertfordshire at 8pm on February 19 and will allegedly revolve around the big reveal of Archie's killer.
Executive producer Diederick Santer told the Daily Star: "I want it to be a memorable slice of Walford drama in every sense. Every time I think about this episode I get excited as well as a little nervous."
He added: "It's a big test for every member of the production team and, I hope, a big treat for the audience."
However, an EastEnders spokesperson this afternoon told DS: "It's fantastic that speculation and excitement is building around our 25th anniversary storylines, but it's too early for us to reveal anything as we really want to keep it a surprise for our viewers."
> 'EastEnders' Christmas plot revealed