Tonight EastEnders saw the return of actress Jo Joyner - but she messed up her big comeback by using the wrong name in a live scene.
Jo, who plays Tanya Branning from 2006-13, asked character Jane Beale: "How's Adam?" in conversation, leading to a confused look on Jane's face.
Character Tanya was supposed to be referring to Ian Beale, Jane's on-screen husband, but instead used Adam, because Ian is played by Adam Woodyatt.
Tanya calling Ian, Adam
On Twitter fans reacted with amusement to the error.
Michael O'Leary said: “Tanya said Adam instead of Ian ooops she's getting sacked."
Cora, Abi and Tanya
Kristie Fenwick said: "Tanya comes back for 10 seconds and already ruins her lines."
And Mollie Im said: "Tanya messed her line up!! She said how's Adam instead of Ian Hahahaha."
Elsewhere in the episode, Ian and Jane Beale married in other live scenes that went more smoothly without a major hitch.
Dot Cotton confessed to killing Nick Cotton and Peter Beale pointed the finger at his father Ian and Jane Beale for the murder of Lucy Beale, saying he now knew she was murdered in their house.
The identity of the murderer will be revealed tonight in the next episode.
LOOOOOOL i swear Tanya just called Ian his real name... Adam #EELive— Prince Kay (@PoundYamDaily) February 18, 2015
To clear up any confusion after getting bombarded with messages, Jake urged his Twitter fans to RT this message: "For the benefit of the Internet and mankind in general please RT YOU. Thank YOU (see what I did there) #EELive #justthebeginning."
He also retweeted dozens of fans who joked about him doing a better job at breaking the internet than reality royalty Kim Kardashian when she posed naked for a French magazine.
It is not a case of did @mrjakedwood mess up his lines, its a case of the audience not accepting the script!— . (@soemthing2000) February 18, 2015
Last night, Jake sent EastEnders fans into a frenzy when he appeared to mumble his line.
"Just had to rewind eastenders like 37484 times to find out if max said you or who," one said.
Samantha Bacchus said: "Well, I didn't have to rewind that a dozen times to figure out what Max said #EELive"
And Abi Nicholson said: "Ok, I've just had to switch subtitles on and rewind to figure out if Max said 'who' or 'you'. What the heck!! #Eastenders"
One user also tweeted: "Did that say who killed lucy or you killed lucy? #WhoKilledLucy #EastEnders #EELiveWeek (sic)"
While another added: "@mrjakedwood just wondering did you meant to say you.. or was it who.. slightly confused (sic)"
@mrjakedwood just wondering did you mean to say you.. or was it who.. slightly confused— samwright ♡ (@samwright2912) February 17, 2015
Though last night an EastEnders spokesman insisted Max got his lines right and said the wording in the script said: "She knows that you killed Lucy", meaning he only added the word 'whether'.
Bookmakers Ladbrokes reacted by cutting the odds on Abi Branning being Lucy Beale’s killer from 8-1 into 4-1.
Spokesman Jessica Bridge said: "It is hard to know if Max fluffed his lines or not, but punters believe it could be Abi and have caused her odds to crash."
The shocking moment was the first cliffhanger of what is set to be an explosive week, and followed his other daughter Lauren leaving after discovering who had murdered Lucy last Easter.
There's still a long way to go before all is revealed, but this has certainly give us all plenty to think about as the soap's 30th anniversary celebrations continue.
Before this moment, we saw bride-to-be Jane Beale open a card from Abi which made things even more cryptic and confusing as the live episodes roll on.
It read: "I know what happened to Lucy. She was killed at home. Lauren"
Given the way the episode ended, this leaves the Brannings and Beales as the lead suspects - but anything could happen before the investigation comes to an end.