Who's That Girl? - S2.E6

For a while now, Gary has noticed a young girl who is turning up at all his public appearances. He and thinks he has a stalker and is quite flattered, actually. Well it makes a change from grannies, doesn't it? The girl, Katie, finally plucks up the courage to speak and visits Gary and Dave in the office. She produces a photo taken at a club nineteen years before of Gary and Dave with her mother. It appears that she is Gary's daughter! Gary goes on the defensive, thinking that she is just after his money. When a DNA test is suggested he accepts, but when the doctor doesn't recognise him, he gets Dave to give the sample instead. He and Dave are in real trouble when the results come through and it proves that ... Well, congratulations, Gary!