Lothario Joey (David Witts), who arrived on Albert Square last month, will pull a stressed Lucy Beale (Hetti Bywater) to one side at her cafe.
Their steamy romance continues until the end of the week, when Joey will be seen standing topless in the Beale dining room.
Playing a central part in this evening's instalment, Joey also feuds with his villainous dad Derek (Jamie Foreman) in tense scenes at the Branning household.
EastEnders airs its one-off Wednesday edition at 8pm on BBC One.
> Read our full spoiler for tonight's EastEnders
> EastEnders: Meet Joey Branning - picture
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