EastEnders spoilers follow.
EastEnders' Whitney Dean will finally learn the truth about Chantelle Atkins' tragic death over Christmas.
Gray's serial killer storyline will be taking centre stage in this year's festive episode, as he prepares to marry his pregnant girlfriend Chelsea Fox.
As we've already teased, Chelsea and Gray's big day will come under threat when Whitney begins to uncover his web of lies in the lead-up, and vows to expose him.
Whitney will begin the week resolute to find out more information on Gray, and begs his former boss Laura to speak to Chelsea. Laura admits that she's already tried but Chelsea didn't want to listen.
Whitney is left further frustrated when she overhears Kheerat telling Gray he'll come to the wedding, keen to put their former feud behind him.
This leaves Whitney feeling evermore isolated in her quest and she storms off.
Desperate for more answers, Whitney decides to question Kheerat about Gray, but he defends him.
Frustrated, Whitney attempts to approach Chelsea instead, but it backfires and she ends up with an unwanted invitation to their wedding.
However, as she attends Mick and Janine's Best Spouse in The 'Ouse evening at The Vic, Whitney is given a major clue, thanks to a comment from Eve.
When Eve mentions about a previous event called Ball And Chain, this strikes a chord with Whitney and she becomes hellbent on getting the truth once and for all.
Following a scare with Chelsea, Whitney becomes determined to find anything that will help her expose who Gray is and what he has done.
After making a breakthrough on Christmas Eve, Whitney is in complete shock as she uncovers the truth and comes to the terrifying conclusion that Gray killed Chantelle.
Finally with proof, Whitney is determined to stop the wedding and expose Gray once and for all.
As Christmas Day arrives, it's all smiles as Chelsea and Denise prepare for their double wedding.
Unbeknownst to them, Whitney has other ideas and is planning to tell Chelsea that Gray killed Chantelle.
Gray and Denise wait for their respective partners at the altar, but they're nowhere in sight.
That's because, Whitney has managed to speak to Chelsea and tell her what she's found out.
Chelsea is stunned by what she hears, but will she believe Whitney or go through with the wedding?
EastEnders will air a 45-minute long episode at 9.45pm on Christmas Day on BBC One.
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