Ben and Jay look at each other in terror as they realise Lola has gone into labour in McKlunky's.
Back at The Arches, Lola is already aware that her waters have broken, but rushes off without saying anything.
Danielle Harold will perform the birth live during an eight-minute sequence, which will also see on-screen granddad Perry Fenwick carry the Olympic torch as Billy Mitchell.
Will Billy make it to see Lola's big moment?
EastEnders airs at 8pm and 9pm on BBC One.
> Read our spoiler for tonight's first EastEnders episode
> Read our spoiler for tonight's second EastEnders episode
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