By Huw Edwards Presenter, The Exchange

Heroin was used as painkiller until doctors realised its addictive quality

These are some of the questions that I'll be hoping to hear some answers to when I return with a one-off special of The Exchange.

Hopefully over the last few weeks you may have seen The Fix on BBC1 Wales.

It's basically a shocking documentary series which exposes the growing cultural norm in Wales of devious dealing, dodging and stealing to fund heroin addiction.

John started using when he was nine, but I had no idea Pam, mother of late heroin addict

It hasn't been easy watching and it has thrown up some difficult questions - and it would be nice if we could get the answers to some of these on The Exchange and it would be nice if you would like to join us.

We'd like to find some answers for people featured in The Fix like Christopher Walters and his family.

Christopher lives with his mum and dad in an ordinary house, in a street like any other in Wales. Like a lot of people, he worries about paying the bills - but the bills he worries about are for heroin.

The 26-year-old from Aberdare has been a heroin addict for eight years and a drug user since he was 15. With a habit costing up to �400 a day, the only way for Christopher to pay for it is to deal and steal.

Neither he nor his parents expect him to live much longer without treatment, but after three years without any sign of rehabilitation help, they were all beginning to give up hope.

Cannabis grows wild in most parts of the world

There are no veins left in Christopher's arms to inject into because they have all collapsed from shooting up.

As The Fix cameras start filming he's finally offered treatment on a methadone programme, but he's still 'clucking' for heroin, stealing from his parents and evading arrest for possession with intent to supply.

Christopher's mum, Anita, is at the end of her tether. She's been to the funeral of her friend Pam's son, John he died of an overdose.

"John started using when he was nine, but I had no idea," says Pam. "If I'd have known sooner I would have done something. But I didn't know."

It's not hard to find heroin - it's like buying a packet of fags Cynon Valley resident

As a last resort, Anita has set up a help group, Family Awareness and Drugs Support (Fads) .

Last year there were almost 300 drug related deaths in Wales and Anita doesn't want her son to be another statistic.

Drugs and crime are intrinsically linked throughout Wales. Daily events such as car thefts and house burglaries which affect everyone relate to a drug habit somewhere.

"It's not hard to find heroin - it's like buying a packet of fags," explains one of the locals. "Half the Cynon Valley is selling it."

Arguably the most vivid representation of the drugs culture which is intrinsic to many Welsh communities, The Fix features a close-up of Swansea prison's tough drugs wing where prisoners try to beat addiction in exchange for parole; a Newport charity, Kaleidoscope, succeeding where the NHS has failed; and drugs officers from Gwent drugs squad, explaining how they crack drugs rings.

Anita Walters agrees: "It's got to stop somewhere along the way, hasn't it? You just can't go on living your life around drugs."

The Exchange is on BBC One Wales at 22:40 BST on Tuesday 4 May.