The BBC One soap got the best birthday present imaginable by breaking viewing records across last week as a whopping 35% of the UK population tuned in to find out who killed Lucy Beale.
Poor Lucy's demise happened at Easter last year but it was only last week viewers learned the identity of her murderer.
A peak of 11.9 million viewers tuned in on Thursday evening to discover little Bobby Beale, 11, had killed his sister... although Jane Beale very nearly took the blame when she found out. We also found out Kathy Beale was back from the dead!
Relive Kathy Beale's time in the soap!
The following night, ten million people watched a fully live episode in which the aftermath of the revelation took place.
Dominic Treadwell-Collins, Executive Producer, said: "We are all over the moon that we captured the nation's imagination with our Who Killed Lucy storyline and Kathy's surprise return.
"My dedicated cast and crew have put so much time and love into our 30th anniversary celebrations, knowing that we have created a little piece of television history is the perfect reward for all our hard work."
All of last week, episodes had included special live inserts - visible to viewers as all live scenes contained the hastag #EELive. The successful week means all three of the highest rated TV episodes of 2015 so far are EastEnders.
Viewers who missed the episodes on TV have been flocking to BBC iPlayer to catch up, with 11.5 million requests for EastEnders registered over the week. An incredible one million people searched for the big reveal episode in the 24 hours after it aired.
And, as well as ruling our TV screens, the soap also took over the internet, with a whopping one million tweets sent during the episode where Lucy's killer was revealed. The official EastEnders account reached more than 43 million people. Wow!
Ben Stephenson, Controller BBC Drama, said: "It is testament to the original vision of Tony Holland and Julia Smith, as well as our amazing editorial team lead by Dominic Treadwell-Collins that after 30 years EastEnders remains at its peak of creativity, ambition and modernity."
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