With Kate having gone back to America, Tim tells Lee he is going to sell the flat, and hires a cleaner called Barbara to clean it. Lee attempts to get a mortgage so he can buy it. In the meantime however he puts off all the potential buyers, until Lucy, who unbeknown to Lee is Tim's sister, arrives saying she will rent the spare room when Lee buys it. Lucy soon decides she wants to buy it herself, and both offer to buy it from Tim. Tim decides to sell it to Lee, however, he cannot get a mortgage so Lucy buys it. On Tim's wishes, she rents out the spare room to Lee. (thetvdb.com)