It's Den and Angie's wedding anniversary. Pauline and Arthur's secret is a secret no more. After Reg's death, the police starts investigating it as a murder.
Quest roles:
Letitia Dean(Sharon), Andrew Johnson(Saeed Jeffery), Bill Treacher(Arthur Fowler), Gillian Taylforth(Kathy), Anita Dobson, Sandy Ratcliff(Sue Osman), Peter Dean(Pete Beale), Wendy Richard(Pauline), Leonard Fenton(Dr. Harold Legg), Gretchen Franklin, Anna Wing, Leslie Grantham(Den Watts), Harry Miller(DI Marsh), Nej Adamson(Ali Osman), John Altman(Nicholas Charles "Nick" Cotton), Shreela Ghosh(Naima Jeffery), Brian Hoskin(Mr. Chumley)