Mick is left reeling on tonight's EastEnders when Katy Lewis, the woman who abused him when he was a boy, arrives in Albert Square.
Katy Lewis, played by Simone Lahbib, is the mother of Mick's daughter Frankie.
Releasing photos from Friday's episode, the BBC says: "When Katy Lewis arrives in Walford, Mick is shocked. How will he cope when faced with a ghost from his past?"
The episode airs on RTÉ One at 8:00pm and BBC One at 8:05pm.
If you have been affected by issues raised in this story, please visit: www.rte.ie/helplines.
EastEnders airs on RTÉ One and BBC One on Mondays, Tuesdays, Thursdays and Fridays.