However, it soon became clear that Stephanie was very manipulative and used sex to her advantage.
She also used her status as a doctor and gave Leonard fake medical advice in an attempt to squash his annoying habits.
In episode 10, The Vartabedian Conundrum, Stephanie moved into his Leonard’s apartment and he realised that things may be moving to fast between them.
After a conversation with Penny (Kaley Cuoco), Leonard decided to try and take things slower, which was met by a furious reaction by Stephanie.
In the end, Leonard decided to break things off over text and turned his attention to Penny.
Fans of The Big Bang Theory can thank Stephanie for bringing Leonard and Penny together, who went on to get married in season 10.
The Big Bang Theory is streaming on Netflix now