Emmerdale's Cain Dingle receives a mysterious set of letters next week - ahead of the arrival of his long-lost sibling.
The much-loved soap character is currently in prison after pleading guilty to the murder of Al Chapman, despite the fact it was his son Kyle Winchester who aimed the gun at Al. Cain is protecting his son Kyle, with Amy and Moira also keeping the secret too.
However, he is set to have another upset coming his way as next week, he's contacted by a mystery person who has been writing to him frequently whilst he's been in prison - but he's not keen for them to be in contact.
