How about after all the hassle of finding out about Cain, he gets a call from Kathy who now live's in Australia, she tells him about the new treatment that will make him walk again. So he leaves Charity and Zoe in charge of home farm.
the treatment takes 6 months, but while there he falls in love with Kathy again, she won't go back to Emmerdale, so he stays in Australia with her, divorces Charity, hands home farm to Zoe and takes Joseph to live with him and Kathy...