The Anniversary is the eleventh episode of Fawlty Towers which aired on the 26th March 1979.
The 17th April the Fawlty's fifteenth wedding anniversary. Sybil has stormed off thinking Basil had forgotten like last year. Basil was secretly planning paella, wine and a surprise drinks party with friends. Meanwhile Manuel and Terry are fighting over who cooks the paella. When Roger and Alice arrive Basil informs them Sybil is unwell. Next Arthur and Virginia arrive with cake. Finally Reg and Kitty arrive and claim to have seen Sybil driving through town.