If fans rewind all the way back to season 6, episode 15, the Spoiler Alert Segmentation revealed a glimpse of Debbie in a quick snapshot that most viewers missed.
In one scene, Raj popped around to the Wolowitz household to join her for dinner, as Howard and Bernadette were away for the night.
During the conversation, the scene cuts from Raj to the kitchen doorway where her usual raspy tones can be heard from.
However, after she asks him if he’s ready to have dessert, she can be seen fussing in the kitchen behind him, leaving some of the audience to gasp at the sight of her.
source: express.co.uk