Casualty's Faith Cadogan to make a big decision over Iain romance

Casualty spoilers follow.

Casualty will air a dramatic decision for Faith Cadogan in her relationship with paramedic Iain Dean.

Faith is still struggling with her drug addiction, even taking them at work. Meanwhile, an unaware Iain asks her to go away with him for the weekend and offers to help her in her recovery, suggesting she should do regular drug testing, an idea which makes her uncomfortable.

Later on, Faith treats medical student Chelsea, who has collapsed. A budding doctor herself, Chelsea insists she knows what's wrong with her, but her attitude only makes Faith suspicious.

BBC

She discovers the teen has been hiding a pregnancy. Faith and Ryan prepare for delivery but find only the placenta, while there isn't any trace of the baby.

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It is revealed that Chelsea had given birth earlier that day and abandoned the baby. She is unhappy when later told they've found it as she wants to keep it a secret so as not to change anything in her life.

Chelsea explains her mum doesn't believe she can be a doctor and this would only prove her right. Faith tries to reason with Chelsea, telling her that everybody makes mistakes, but the important thing is to not let them rule your life.

BBC

However, the doctor doesn't seem to be able to take her own advice. When Iain asks Faith for the drugs test, she confidently hands over Chelsea's sample she took from her earlier, which is obviously clean.

Iain expresses his doubts over the results, leading Faith to question if he trusts her. Iain tells her he's doing it out of love, but she says she doesn't feel the same and ends their relationship.

These scenes air on Saturday, July 22 on BBC One.

Casualty airs on Saturdays on BBC One and streams on BBC iPlayer.

For more on drug addiction and dependency, including information and support, please visit FRANK or Action on Addiction.