Stephanie has moved into the apartment without Leonard even noticing; Leonard wants to slow things down with Stephanie.
The Big Bang Theory Wiki | Fandom·Contributors to The Big Bang Theory Wiki Series 02 Episode 10 – The Vartabedian Conundrum [S2E10] The Vartabedian Conundrum
(Season 2, Episode 10) is a pivotal episode of The Big Bang Theory that explores the themes of unintentional domesticity and the boundaries of the Roommate Agreement . Plot Overview Stephanie has moved into the apartment without Leonard