It is Nana's special day: it isn't every day you get to be 79. She is excited about spending the afternoon with her whole family - even Pat and Jim, who both love a great practical joke. Her Angela has put on a lovely spread, including a huge cake. But as Nana says, 'Don't worry about the future: you can't predict it'.

• Steve Pemberton
• Reece Shearsmith

• Sophie McShera
• David Warner
• Helen McCrory