Only Fools and Horses · S4, E1
Happy Returns
Del rekindles an old romance with June, who he last saw around nineteen years ago, while Rodney is also lucky in love with a girl from the newsagents called Debby. It soon transpires that Debby is June's daughter, and it's almost her 19th birthday. Del and Rodney put two and two together, and decide that Debby may well be Del's daughter.