History is filled with tales of great minds coming together, and collaborating, to achieve incredible things. It's also full of idiots working together to create an unholy mess, and people forming partnerships for decidedly sinister reasons - welcome to Horrible Histories' Chaotic Collabs! 

The Black Hand Gang worked together to assassinate Archduke Franz Ferdinand of Austria, and thus trigger a chain of events that led to World War One, but did you know that their collaboration was almost unsuccessful, owing to how many mistakes they made? Here, we reveal how they achieved their aim almost by luck, rather than judgement. 

Elsewhere, Burke and Hare get jobs as supply business teachers in historical educating, King Akhenaten and Queen Nefertiti collaborate with Sophie and Sebastian in a bid to rejuvenate their Gods, and "Ahoy!" magazine reveals how Admiral Nelson is seemingly enjoying a collaboration with someone else's wife. 

We admire one of history's great duos - Sir Edmund Hillary and Tenzing Norgay - whose journey together to be the first people to reach the summit of Everest is rightly the stuff of legend - but there seems to be some disagreement between them as to who was actually the very first to set foot on the top. 

The collaboration between Great Britain and America has often been referred to as a 'special relationship' - so special in fact, that Winston Churchill once made President Roosevelt take a meeting with him whilst he was in the bath. Literature and the arts are filled with tales of group creativity - did you know that William Shakespeare sometimes brainstormed his plays? One of these instances surrounds Macbeth, and the decision to change his fairy characters into witches. Finally, we take a musical look at one of the finest ever artistic groups: the romantic poets. 

Families - sometimes you love them, sometimes you bicker with them, and sometimes you marry them off to consolidate your power in Europe. Welcome to a look at some of history's most fearsome families. 

In this episode, Fred Sirieix is on hand as Queen Victoria makes several trips to the Historical First Dates restaurant, in a bid to marry off her children for love, and definitely not to consolidate her empire. Elsewhere, Leopold Mozart is lovingly retiring his 18-year-old daughter Maria Anna from performing in public, in favour of bringing little Wolfgang into the spotlight, and Henry VIII's children Elizabeth, Mary and Edward are engaging in a regal game of 'Your Mum'. 

Paulina Pepys is grateful for the help from her brother Samuel when he offers to put her up in his home, right up until the point at which she discovers she is actually graciously being given a roof over her head in return for becoming one of his servants - and she is very much starting at the bottom of the servant scale. 

In Made In Macedonia, Alexander the Great can't quite work out why people who stand in the way of his advancement keep mysteriously dying, and his mum, Olympias, is completely in the dark about it too. 

Meanwhile, we take a look at what Puritan children did for fun as they head down to ‘fun' theme park 'Puritown', we see what happened back at home for Viking families when the male Vikings went away pillaging for months, and the Bronte sisters tell us about their triumph over adversity. Brother Branwell tries to get in on the act, too, but it seems that no-one really listens to him.