In the labs: They talk and figure out what's happened, and that JARVIS has been destroyed, and Ultron has escaped through the internet. Steve is angry at Tony. Maria and Rhodey are worried Ultron getting nuclear codes and other horrible things from the internet. A bot made off with the sceptre and Thor was unable to catch it. He's very angry at Tony.

SOKOVIA: Ultron has transferred himself into the broken iron legion bots HYRDA left behind in their castle base. Cue creepy music.

Ultron meets with the twins in a church. Wanda can't read his mind because he's not human. Wanda realises this is the result of Stark and the sceptre and asks if he's here to destroy the Avengers. He says 'I've come to save the world, but also....yeah.'

AVENGER TOWER: reports of the twins messing with people and Baron Strucker has been killed. The Avengers decide this is because Baron had info that Ultron doesn't want them to know. They can't find any electronic info, but luckily they have SHEILD's old paper files. Tony recognises one of the Baron's old acquaintences, an arms dealer. He has a brand on his neck. Bruce searches for it - it means 'theif' in an African direlect. Our dealer comes from Wakanda. Whcih is why vibranium comes from. Avengers assemble.

WAKANDA: a rusted old war ship, full of busy people. In a dingy office the twins try to intimidate the arms dealer (Andy Serkis) but he's not intimidated and will only 'talk business' with 'the man in charge'. Ultron shows up. 'There is no man in charge. Let's talk business.' They talk buisness - Ultron transfers lots of money to the bad guys in exchange for their vibranium. He says, 'keep your friends rich and your enemies rich and wait to find out which is which.' Our dealer recognises this as a Stark expression and accuses Ultron of being 'one of his'. This makes Ultron mad and he accidentally cuts off the dealer's arm.

Avengers arrive. They try to keep things peaceful, but Ultron isn't having it. They fight. Then Wanda messes with everyone's heads. Thor says he will not be affected - 'fortunately I am mighty' - but he is, only he's more aware than the others. He sees Asgard gone wild and Heimdel telling him he's a destroyer and leading them all to Hell. Cap sees a ballroom full of people and Peggy telling him the war's over and they can go home, but wine on clothes looks like people are bleeding and camera flashes are like bombs going off. Natasha sees her past - we have ballet dancers, her shooting at a target which is replced by someone with a bag over their heads, Natasha trying to fail a fight because she doesn't want a graduation ceremony, being wheeled to an operation, a woman telling her 'it is necessary' and 'you never fail' and Natasha saying 'there's no place for me in the world.'

Clint, however, sticks a blue crackling arrow to Wanda's forehead and says 'i've done the whole mind control thing. Not a fan.' Pietro knocks Clint over and runs off with his sister.

Meanwhile Tony has flown after Ultron, who says he (Ultron) is everywhere, so that was kind of useless, and also Tony should be looking for Doctor Banner.

Because Wanda has now messed with Bruce and the Hulk is smashing up a city. Clint says Tony isn't getting backup because everyone else is zonked, and Clint helps Natasha up. BIG FIGHT. SPECIAL ARMOUR. WITTY PHRASES. PEOPLE SCREAMING. LOTS OF MESS. Iron Man eventually knocks Hulk out.

ON THE QUINJET: everyone is quiet and sad and it's dark days. Tony talks to Maria on comms who says 'The news is loving you. No one else is.' She advises that there's no arrest out for Banner yet, but it's only a matter of time, Stark Relief Foundation is helping out, and they should stay in stealth mode and stay away.

Clint is flying. Tony asks if he wants a break, but Clint says they're only a few hours out. 'From where?' 'A safe house.'