A psychiatrist and his wife come to stay and Basil thinks Sybil is telling them all about his life.
When some work is required on the hotel lobby, Basil goes for the cheapest quote - an Irish builder by the name of O'Reilly - the moment his wife is out of the way. O'Reilly and his workers make a mess of the job, fitting doors where they shouldn't be and putting in walls where there were supposed to be doors. As a result, Sybil is forced to call in a proper builder, only to suffer embarrassment when O'Reilly returns to fix the mess he made. However, she soon realizes that thanks to the work of O'Reilly and his men, the hotel is no longer structurally sound.
The Wedding Party:
Basil's prudish nature is outraged by what he perceives to be an outbreak of promiscuity at Fawlty Towers. As ever, he grabs the wrong end of the stick and then proceeds to beat himself with it. Yet another terrible day for Basil ends with his apparent discovery by the guests in a compromising position with Manuel.