EMMERDALE killer John Sugden has struck again.

The maniacal medic – who is played by actor Oliver Farnworth in the ITV soap – has already murdered Nate Robinson in a shock twist last year.

But now he’s killed again as his ex-boyfriend Aidan woke up from his coma.

Forced into going to the hospital by Aidan’s unwitting mum, John wasted no time in showing his true colours.

After raging about how weak Aidan was and revealing that he put him in the coma, John soon decided that Aidan had to die.

“I wanted to get something that would be easier for you – painless,” he said.

“So you’d just drift off. But your mum wouldn’t leave me alone so this is all I could grab.”

Producing a needle, John attached it to Aidan’s IV line – and prepared to kill him by putting air into his blood to kill him.

John added menacingly: “It’s just going to be a little bit of air. They won’t notice it but you…

“I have to, you’ll tell them what happened but you’ll twist it and lie. I know you will and I can’t have that.

“I loved you and I am so so sorry.”

But as he went to kill Aidan, John hesitated – and it had devastating results.

Aidan’s terror saw him suffer a cardiac arrest – and he died as John ignored the chance to save him.

Instead he waited and then pretended to fight to save him after alerting the neighbours.

Later when Aaron arrived and found John there he was furious – and called off the wedding before driving off.