Ruth is concerned about becoming increasingly forgetful, and is even more perturbed when Martin offers to perform a mini mental state examination. It confirms she is showing early signs of dementia. Meanwhile, Louisa plans a special evening to celebrate Martin's birthday, and Al decides to throw Morwenna a surprise engagement party on the same night. There are also problems when Louisa's class tutorial ends in disaster.
Elenco: Martin Clunes , Caroline Catz , Joe Absolom , Ian McNeice , Selina Cadell , Katherine Parkinson , Stephanie Cole , Angeline Ball , Roger Lloyd Pack , Jake Wood , Lia Williams , Stewart Wright , Chris O'Dowd , Amanda Abbington , Lucy Punch , Eileen Atkins , John Marquez , Jessica Ransom , Ashton Hinchliff , Louise Jameson .