WARNING: SPOILERS AHEAD
EastEnders fans watched in horror as Kat Moon (Jessie Wallace) struggled to escape the deadly flames following husband Alfie (Shane Richie)'s ill-fated arson attempt.
And, in tonight's heartbreaking episode, we will see Kat learn the full extent of her injuries for the very first time.
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With Alfie and niece Stacey Branning (Lacey Turner) there for support, nurses and burns doctors carefully unwrap the dressings on Kat's face.
But, taking up a mirror, the brave mum-of-three is left devastated when she is faced with the extent of her scars.
Seeing his wife in pain, Alfie is left to struggle with his conscience.
Should he tell his wife that he was the one who torched the home they share with their young children?
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Speaking on This Morning, Shane warned viewers of the soap that Kat's injuries as a result of the fire will be 'life-changing'.
He said: "For Jessie as an actress, being able to play the storyline we have got coming up after this event is brilliant."
He added: "It will be such a departure from how we know Kat now - the tart with the heart and the heavy make-up. She will become the complete opposite to that. It is heartbreaking."
Eastenders will air on Thursday at 7:30pm on BBC1.