It's believed that as many as 800,000 people under the age of 18 care for sick parents or siblings: one in 20 children in Britain. In the second episode of his new series, Ross Kemp investigates the hidden crisis of young carers and starts in Blackburn where he stays the night with the Haywood family. Lizzie, 15, carries out care work for her mother, Donna, who suffers from serious physical difficulties and schizophrenia. Ross discovers that due to her care workload, Lizzie often does her homework late into the night. Accompanying a charity worker, Ross is shocked when he meets young carers as young as five. They include Ali, who cares for his his sister Zainab, a cerebral palsy sufferer with epilepsy and visual impairment. Their mother, Hanifa, says she would be lost without Ali's help. Ross discovers how much money young carers are saving the economy but at the same time, funding for services to help them is falling.

Ross Kemp explores the country's knife crime epidemic. He meets teenagers who say they carry knives for self protection, parents who fear for their children's lives and community leaders taking drastic measures to put and end to the violence.

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In the first of a two-part special to begin the second series, the actor and film-maker examines the real-life impact of dementia. He meets Scott Mitchell, the husband of his former on-screen mum Barbara Windsor, who was diagnosed with Alzheimer's disease in 2014. Ross also travels to Leatherhead, Surrey, where he stays with Jerry Beckman, an actor, magician and keen sportsman who has early-onset dementia and Parkinson's disease.

The actor and documentary-maker continues his examination into the impact of dementia, meeting a family whose five-year-old girl has a form of the disease and a woman who needs to sell her mother's house to pay for her £70,000 annual care home fees. Ross also talks once more to Scott Mitchell, husband of his former colleague Barbara Windsor, to find out how they have been coping during lockdown.

An investigation into the problem of addiction to opioids - opium-derived drugs - which are used in powerful prescription painkillers. Ross meets a woman who ended up with a serious addiction after being prescribed drugs for her bad back. He also learns about fentanyl, a painkiller used in cancer treatment, which can be much stronger than heroin and is being advertised for sale illegally in the UK. Ross comes face to face with a drug dealer who has started cutting fentanyl into his product and meets a former chemist whose daughter died from an overdose after taking heroin laced with the drug.

The film-maker investigates how the housing crisis has resulted in some vulnerable families agreeing to be moved by local councils - sometimes many miles away from loved ones - just to keep a roof over their heads. He meets a mother of three whose temporary accommodation across London has ended up being her home for three years so far, and also hears from families in Bradford who say that refusing an offer of accommodation 200 miles away would bring shocking repercussions.