EastEnders, Jean Slater's return will add to the intrigue surrounding her daughter Stacey Branning's mysterious key.

Jean arrives back on screen with the surprising news that she will soon be getting married to her boyfriend Ollie Walters.

Jean gets into a panic over Stacey's key

A sceptical Stacey doesn't react well to the revelation and questions Jean about whether she has been taking her medication, which upsets her mum and causes her to run off.

When Stacey realises that she was unfair with Jean, she apologises and they go off shopping together so that Stacey and Lily can both get new dresses fro the wedding.

Once they're back at home, however, Jean suddenly panics when she spots the key around Stacey's neck. When Jean leaves shortly afterwards, a baffled Stacey admits to Martin that she is more determined than ever to find out what the key opens...

Martin and Stacey are baffled by Jean

Airs Monday, July 6th