My private life is my own," snaps harassed Dr Prentice. He is under investigation by Dr Rance, who has been sent from the Ministry to find out what is going on in Dr Prentice's consulting room. As Dr Rance arrives, Dr Prentice, a psychiatrist, is interviewing Geraldine, a prospective new secretary. "I may cause you embarrassment, but I am a doctor," he tells her smoothly. "What is your shorthand speed?" This innocent question is immediately followed by a demand that Geraldine strip for physical examination. Cue arrival of the doctor's wife, who's own predatory sexual instincts do not bear too much examination. "I am expecting to send you to your grave in a Y-shaped coffin," he tells her.

If you have never seen Joe Orton's What the Butler Saw, you get a clue about it immediately you walk into the OFS Studio. The excellent set (designer strangely uncredited in the programme) includes no fewer than four sets of doors. That indicates that you are about to see a farce - or it certainly did in 1969, when the play was first produced. But, this being Orton, What the Butler Saw is much more than a rib-tickler. Flowing among the laughs are sharp observations about the medical profession, political correctness, and human sexual predilections of just about every variety.

In this Oxford Theatre Guild production, director Alexander Rogers perhaps slightly over-eggs the farcical pudding. Hotel page-boy Nick (Tom Walling) and wet-behind-the-ears policeman Match (Tim Bearder) are required to adopt strange accents, and wear ill-fitting wigs - indeed wigs are just about all they wear for much of the time.

However, the production is firmly anchored by Colin Burnie as roving-eyed, and equally roving-fingered Dr Prentice, Olivia Zetterstrm-Sharp as the confused secretary, Helen Wilson as Mrs Prentice, and Peter Roberts as the pompous Ministry investigator. Above all, director Rogers demonstrates that What the Butler Saw has dated remarkably little.

What the Butler Saw continues at the OFS Studio, George Street, until Saturday.