Series 2 starts with the news that Abby and Karl have left the house. Don is heartbroken and alone. He explains that Abby broke up with Karl and, shortly after, decided to get away and spend time on her own. She's gone traveling across Australia and New Zealand.The new castAlthough Don feels desperately lonely he will never be truly 'alone'. Not with Eddie around. And now that Eddie is also looking after grumpy old neighbour, Mrs Treacher, Don will always have company. Just the wrong age, wrong temperament and absolute remote possibility of sexual attraction.After some time moping about the house Don has an epiphany. He realises that all might not be lost. When Abby returns in six months she'll, hopefully, still be single. And if she is, then he might have a chance of winning her affections. Which means this might be his last chance to play the field. There's no point in wasting his bachelor lifestyle. So with this in mind Don starts looking for a new lodger. Which leads us to Samantha, the new woman in Don's life.After some time moping about the house Don has an epiphany. He realises that all might not be lost. When Abby returns in six months she'll, hopefully, still be single. And if she is, then he might have a chance of winning her affections. Which means this might be his last chance to play the field. There's no point in wasting his bachelor lifestyle. So with this in mind Don starts looking for a new lodger. Which leads us to Samantha, the new woman in Don's life.Samantha is a mature student, although only in her mid twenties, who was once a model with modest success. As a teenager, her mother encouraged her to take up modeling, earning her easy money. But now well into her twenties; tired of that profession and with no real qualifications, Sam has decided to go back into education.To say Don and Sam don't hit it off immediately would be an understatement. And although they initially dislike each other and strike up an unhealthily competitive relationship, it soon becomes clear that they have more in common than they'd care to admit. For a start they both have a habit of going on seriously bad dates with other people and seem to be equally bad at practicing what they preach.