VIDEO Coronation Street stars talk about armed siege scenes
The actress' alter-ego Hayley Cropper and Carla Connor (Alison King) will be taken hostage in Underworld by evil Tony Gordon (Gray O'Brien) after he breaks out of jail.
Viewers will see the factory set alight during the armed siege.
'There is a point where Hayley and Carla both really think it's curtains for them and maybe it is,' says a cryptic Julie, 40.
The episodes will be the most expensive in the history of Corrie.