Dan lives above Steve. He's in his late 20s and going through a bit of a crisis. He's unemployed, lonely and needy - he often knocks on Steve's door just for a chat when all Steve wants is to be alone with Becky. But Steve can't be mean to him because he knows Dan's troubled.
Throughout the series, Dan is looking for love, getting over his ex-girlfriend Anita and going through a series of self-improvements in the hope that one day a girl will fall for him.