Thursday’s EastEnders featured a major revelation when Lauren Branning came upon a note in the late Emma Summerhaye’s case file on Lucy Beale’s murder.

Lauren discovered the ripped note in Max’s flat, a forgotten trace of the file after Max tried to destroy it in the wake of Emma’s death.

The note suggests a person interviewed in Lucy’s murder investigation cannot account for 10 hours on the night of the evil deed.

Emma’s conclusion is: “Doesn’t Add Up.”

But who is that person and whose phone number is it?

Lauren Branning knows. Do you?

The murderer will be revealed in EastEnders’ 30th anniversary week programming. Read the full schedule here.