Things have come to a head for Big Mo on EastEnders, but that's not what has gotten viewers talking.

Mo's scheming has finally caught up with her - she's recently had to come clean about lying to Stacey and the rest of the square that Kat had died and that she was out to make money to clear up her debts. After Mick realised that there was money missing from the collection at the Queen Vic, the family caught up with Mo and demanded she pay up. Mo was on her way to return the money to the pub when she ran into debt collector Annie. She wasn't messing around - Mo was beaten up and Annie made off with the stolen money. It was all a bit dramatic but we couldn't get over who the debt collector was. Remember Horrible Histories? Martha Howe-Douglas, the actress who plays Annie, was a cast member on the BBC kids' history show between 2009 and 2013. She's also known for roles in BBC soap Doctors and in ITV's Doctor Foster. Needless to say, Twitter got a great kick out of seeing the woman from Horrible Histories pop up in Walford.

Loved her in Horrible Histories. #EastEnders #Way pic.twitter.com/xAuQaNJbaK

— Ruby Wijker ♑ (@Rubyboe_) March 26, 2018

@MarthaHD you in EastEnders blew my mind! Surreal and different to horrible histories ?? but very good!

— Emily Prince (@EmmyBush) March 23, 2018

While lots of people joked that they just can't see her as a menacing debt collector.

Why is the horrible histories lady suddenly some weird gangster brummie #EastEnders

— Owen Butters (@ButtyOh) March 22, 2018

The woman from Horrible Histories is on Eastenders asking for £5,000 and I can't even deal ??

— #BROKEN Courtney ?? (@cheesybiscuit_) March 22, 2018

how am i supposed to take the woman from horrible histories playing some gangster on eastenders seriously

— morgs (@morgshennessy) March 23, 2018

How am I meant to take the Gyal from horrible histories serious as a gangster in eastenders when this is what I see when I look at her??? pic.twitter.com/Q4m7K1V99Q

— kate?? (@KateeThompsonn) March 23, 2018

#eastenders Mo about to be subjected to horrible histories

— Julian Hilaire (@julianhilaire) March 26, 2018

We'd have to agree - anyone who has rapped while playing Queen Elizabeth I isn't too scary in our books.