Bianca desperately tries to get through to Sonia in Thursday's EastEnders on RTÉ One and BBC One.
Releasing first-look photos, the BBC soap said: "Bianca tries to convince Sonia that Terry hasn't changed by showing the bruises on her wrist.
"But when Sonia asks Terry what happened, he tries to manipulate the situation.
"Will Sonia believe her sister or the father who just walked back into her life?"
Fans can watch what happens next on Thursday on RTÉ One and BBC One at 7:30pm.
EastEnders airs on RTÉ One and BBC One Monday to Thursday.
