CORONATION Street’s Kit Green’s dark secret has been exposed – and he faces the ruin of his own life.

The corrupt detective – who is played by actor James Roberts in the

ITV soap – has had a connection to troublesome newcomers Mick and Lou.

And in today’s episode it has been revealed.

The three were pals as teenagers and while messing around with a shopkeeper, Kit felt aggrieved and took revenge by setting off fireworks in the locked shop after he left.

However the man’s wife was inside and Kit and Mick listened as she screamed in agony at the burns.

Kit fled and Mick was caught and Kit let him take the blame – but now he’s holding it over the cop and threatening to ruin his life and career.

Mick decided to also torment Bernie but let slip a little too much in an effort to bulldoze their relationship too.

But when Bernie walked in and demanded the truth, Kit buckled.

He told her about Mick’s blackmail and how he was going to ruin his life after all this time.

And when Bernie asked what Mick had done – she was shocked that it was Kit who was responsible for the arson that left the shopkeeper with third degreee burns.

He told his biological mum: “I didn’t even know he had a wife. She had these third degree burns and the screaming.

“I should’ve gone down for it. I shouldn’t have been allowed to join the force anyway.

“So I lied, and lied, and lied. Let my best mate take the wrap.”

But that wasn’t the only secret to emerge.

While Mick was locked up for a crime he didn’t commit, Kit compounded the wound by sleeping with his girlfriend Lou.

And worst of all – that resulted in a child who Lou passed off as Mick’s for all these years.

With Brody released from the STC, Mick and Lou took him to Speed Daal to celebrate where Kit ran into them.

He overheard Brody’s age and realised that he is Brody’s biological father.

But what will Kit do now and how will Mick react to his on not bing his biological son?