Ep 10. Fly

Walter, still grieving over Jane's death, is having difficulty sleeping and has become paranoid about those around him. Jessie decides to help Walter out and spends the night in the lab with him, looking for a fly that Walter is convinced is contaminating their meth. As the two work to catch the fly, they have a heart-to-heart conversation about their troubles. Meanwhile, Skyler worries about the cleanliness of the car wash and enlists Saul's help to find someone to clean it. Saul sends Mike, his fixer, to clean the car wash and Skyler becomes attracted to him. When Walter finds out, his jealousy flares up and he confronts Skyler, leading to a tense moment between them. Eventually, Jessie and Walter capture the fly and Walter is able to get some sleep. The episode ends with Walter receiving a call from Gus, setting up the events for the season finale.